2757680640 has 960 divisors, whose sum is σ = 12011231232. Its totient is φ = 597196800.

The previous prime is 2757680621. The next prime is 2757680647. The reversal of 2757680640 is 460867572.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2757680647) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 88957425 + ... + 88957455.

Almost surely, 2^2757680640 is an apocalyptic number.

2757680640 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 2757680640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6005615616).

2757680640 is an abundant number, since it is smaller than the sum of its proper divisors (9253550592).

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

2757680640 is a wasteful number, since it uses less digits than its factorization.

2757680640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 2757680640 is about 52513.6233752728. The cubic root of 2757680640 is about 1402.3227835221.

The spelling of 2757680640 in words is "two billion, seven hundred fifty-seven million, six hundred eighty thousand, six hundred forty".