2651019840 has 560 divisors, whose sum is σ = 11359286400. Its totient is φ = 573308928.

The previous prime is 2651019823. The next prime is 2651019841. The reversal of 2651019840 is 489101562.

It is a tau number, because it is divible by the number of its divisors (560).

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

It is a junction number, because it is equal to n+sod(n) for n = 2651019795 and 2651019804.

It is not an unprimeable number, because it can be changed into a prime (2651019841) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3446976 + ... + 3447744.

It is an arithmetic number, because the mean of its divisors is an integer number (20284440).

Almost surely, 2^2651019840 is an apocalyptic number.

2651019840 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 2651019840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5679643200).

2651019840 is an abundant number, since it is smaller than the sum of its proper divisors (8708266560).

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

2651019840 is a wasteful number, since it uses less digits than its factorization.

2651019840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 2651019840 is about 51488.0553138298. The cubic root of 2651019840 is about 1384.0050007059.

The spelling of 2651019840 in words is "two billion, six hundred fifty-one million, nineteen thousand, eight hundred forty".