87477513887 has 16 divisors (see below), whose sum is σ = 96699137472. Its totient is φ = 78712381440.

The previous prime is 87477513857. The next prime is 87477513923. The reversal of 87477513887 is 78831577478.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87477513887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87477513857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 733187 + ... + 844107.

It is an arithmetic number, because the mean of its divisors is an integer number (6043696092).

Almost surely, 2^87477513887 is an apocalyptic number.

87477513887 is a deficient number, since it is larger than the sum of its proper divisors (9221623585).

87477513887 is a wasteful number, since it uses less digits than its factorization.

87477513887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112978.

The product of its digits is 73758720, while the sum is 65.

The spelling of 87477513887 in words is "eighty-seven billion, four hundred seventy-seven million, five hundred thirteen thousand, eight hundred eighty-seven".