87977427968 has 22 divisors (see below), whose sum is σ = 175868942526. Its totient is φ = 43988713472.

The previous prime is 87977427953. The next prime is 87977427983. The reversal of 87977427968 is 86972477978.

It is an interprime number because it is at equal distance from previous prime (87977427953) and next prime (87977427983).

It can be written as a sum of positive squares in only one way, i.e., 74402381824 + 13575046144 = 272768^2 + 116512^2 .

It is a junction number, because it is equal to n+sod(n) for n = 87977427895 and 87977427904.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42956705 + ... + 42958752.

Almost surely, 2^87977427968 is an apocalyptic number.

It is an amenable number.

87977427968 is a deficient number, since it is larger than the sum of its proper divisors (87891514558).

87977427968 is an equidigital number, since it uses as much as digits as its factorization.

87977427968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85915477 (or 85915459 counting only the distinct ones).

The product of its digits is 597445632, while the sum is 74.

The spelling of 87977427968 in words is "eighty-seven billion, nine hundred seventy-seven million, four hundred twenty-seven thousand, nine hundred sixty-eight".