87798691564 has 24 divisors (see below), whose sum is σ = 154918033088. Its totient is φ = 43537720320.

The previous prime is 87798691559. The next prime is 87798691601. The reversal of 87798691564 is 46519689778.

It is a super-2 number, since 2×87798691564² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87798691493 and 87798691502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100492 + ... + 430924.

Almost surely, 2^87798691564 is an apocalyptic number.

It is an amenable number.

87798691564 is a deficient number, since it is larger than the sum of its proper divisors (67119341524).

87798691564 is a wasteful number, since it uses less digits than its factorization.

87798691564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330985 (or 330983 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 70.

The spelling of 87798691564 in words is "eighty-seven billion, seven hundred ninety-eight million, six hundred ninety-one thousand, five hundred sixty-four".