87768758961 has 36 divisors (see below), whose sum is σ = 137727237648. Its totient is φ = 53835324192.

The previous prime is 87768758951. The next prime is 87768758963. The reversal of 87768758961 is 16985786778.

It is not a de Polignac number, because 87768758961 - 2⁵ = 87768758929 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87768758961.

It is not an unprimeable number, because it can be changed into a prime (87768758963) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 372966 + ... + 560928.

Almost surely, 2^87768758961 is an apocalyptic number.

It is an amenable number.

87768758961 is a deficient number, since it is larger than the sum of its proper divisors (49958478687).

87768758961 is a wasteful number, since it uses less digits than its factorization.

87768758961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188302 (or 188286 counting only the distinct ones).

The product of its digits is 284497920, while the sum is 72.

The spelling of 87768758961 in words is "eighty-seven billion, seven hundred sixty-eight million, seven hundred fifty-eight thousand, nine hundred sixty-one".