86892431978 has 16 divisors (see below), whose sum is σ = 144518562720. Its totient is φ = 38849074800.

The previous prime is 86892431939. The next prime is 86892431981. The reversal of 86892431978 is 87913429868.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32372888 + ... + 32375571.

It is an arithmetic number, because the mean of its divisors is an integer number (9032410170).

Almost surely, 2^86892431978 is an apocalyptic number.

86892431978 is a deficient number, since it is larger than the sum of its proper divisors (57626130742).

86892431978 is a wasteful number, since it uses less digits than its factorization.

86892431978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64748533.

The product of its digits is 41803776, while the sum is 65.

The spelling of 86892431978 in words is "eighty-six billion, eight hundred ninety-two million, four hundred thirty-one thousand, nine hundred seventy-eight".