7991525376 has 204 divisors, whose sum is σ = 24475149972. Its totient is φ = 2503999488.

The previous prime is 7991525231. The next prime is 7991525383. The reversal of 7991525376 is 6735251997.

7991525376 is a `hidden beast` number, since 7 + 99 + 15 + 2 + 537 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5101387776 + 2890137600 = 71424^2 + 53760^2 .

It is a tau number, because it is divible by the number of its divisors (204).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10026610 + ... + 10027406.

Almost surely, 2^7991525376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7991525376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12237574986).

7991525376 is an abundant number, since it is smaller than the sum of its proper divisors (16483624596).

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

7991525376 is an equidigital number, since it uses as much as digits as its factorization.

7991525376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852 (or 819 counting only the distinct ones).

The product of its digits is 3572100, while the sum is 54.

The square root of 7991525376 is about 89395.3319586655. The cubic root of 7991525376 is about 1999.2935318141.

The spelling of 7991525376 in words is "seven billion, nine hundred ninety-one million, five hundred twenty-five thousand, three hundred seventy-six".