2641391280 has 180 divisors, whose sum is σ = 9750730080. Its totient is φ = 640316160.

The previous prime is 2641391273. The next prime is 2641391287. The reversal of 2641391280 is 821931462.

2641391280 is a `hidden beast` number, since 2 + 641 + 3 + 9 + 1 + 2 + 8 + 0 = 666.

2641391280 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2641391273) and next prime (2641391287).

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2641391287) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 71961 + ... + 102279.

Almost surely, 2^2641391280 is an apocalyptic number.

2641391280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2641391280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4875365040).

2641391280 is an abundant number, since it is smaller than the sum of its proper divisors (7109338800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2641391280 is a wasteful number, since it uses less digits than its factorization.

2641391280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30360 (or 30340 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 2641391280 is about 51394.4674065215. The cubic root of 2641391280 is about 1382.3273895681.

The spelling of 2641391280 in words is "two billion, six hundred forty-one million, three hundred ninety-one thousand, two hundred eighty".