89987001864987 has 16 divisors (see below), whose sum is σ = 120043465608960. Its totient is φ = 59960940655200.

The previous prime is 89987001864983. The next prime is 89987001864989. The reversal of 89987001864987 is 78946810078998.

It is not a de Polignac number, because 89987001864987 - 2² = 89987001864983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89987001864983) 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, 84177562 + ... + 85239872.

It is an arithmetic number, because the mean of its divisors is an integer number (7502716600560).

Almost surely, 2^{89987001864987} is an apocalyptic number.

89987001864987 is a deficient number, since it is larger than the sum of its proper divisors (30056463743973).

89987001864987 is a wasteful number, since it uses less digits than its factorization.

89987001864987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076594.

The product of its (nonzero) digits is 3511517184, while the sum is 84.

The spelling of 89987001864987 in words is "eighty-nine trillion, nine hundred eighty-seven billion, one million, eight hundred sixty-four thousand, nine hundred eighty-seven".