87646796564 has 12 divisors (see below), whose sum is σ = 153438448884. Its totient is φ = 43807239744.

The previous prime is 87646796551. The next prime is 87646796569. The reversal of 87646796564 is 46569764678.

It can be written as a sum of positive squares in 2 ways, for example, as 52834700164 + 34812096400 = 229858^2 + 186580^2 .

It is a junction number, because it is equal to n+sod(n) for n = 87646796494 and 87646796503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87646796569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4027427 + ... + 4049130.

It is an arithmetic number, because the mean of its divisors is an integer number (12786537407).

Almost surely, 2^87646796564 is an apocalyptic number.

It is an amenable number.

87646796564 is a deficient number, since it is larger than the sum of its proper divisors (65791652320).

87646796564 is a wasteful number, since it uses less digits than its factorization.

87646796564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8079274 (or 8079272 counting only the distinct ones).

The product of its digits is 365783040, while the sum is 68.

The spelling of 87646796564 in words is "eighty-seven billion, six hundred forty-six million, seven hundred ninety-six thousand, five hundred sixty-four".