87645668975 has 24 divisors (see below), whose sum is σ = 110191896672. Its totient is φ = 69147187200.

The previous prime is 87645668969. The next prime is 87645669017. The reversal of 87645668975 is 57986654678.

It is not a de Polignac number, because 87645668975 - 2¹⁰ = 87645667951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87645668899 and 87645668908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 549959 + ... + 691191.

It is an arithmetic number, because the mean of its divisors is an integer number (4591329028).

Almost surely, 2^87645668975 is an apocalyptic number.

87645668975 is a deficient number, since it is larger than the sum of its proper divisors (22546227697).

87645668975 is a wasteful number, since it uses less digits than its factorization.

87645668975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141587 (or 141582 counting only the distinct ones).

The product of its digits is 609638400, while the sum is 71.

The spelling of 87645668975 in words is "eighty-seven billion, six hundred forty-five million, six hundred sixty-eight thousand, nine hundred seventy-five".