7900531656 has 32 divisors (see below), whose sum is σ = 19753964640. Its totient is φ = 2633159168.

The previous prime is 7900531643. The next prime is 7900531657. The reversal of 7900531656 is 6561350097.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (7900531657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212920 + ... + 247256.

It is an arithmetic number, because the mean of its divisors is an integer number (617311395).

Almost surely, 2^7900531656 is an apocalyptic number.

It is an amenable number.

7900531656 is an abundant number, since it is smaller than the sum of its proper divisors (11853432984).

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

7900531656 is a wasteful number, since it uses less digits than its factorization.

7900531656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43933 (or 43929 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 7900531656 is about 88884.9349215040. The cubic root of 7900531656 is about 1991.6763780490.

The spelling of 7900531656 in words is "seven billion, nine hundred million, five hundred thirty-one thousand, six hundred fifty-six".