86857774079 has 4 divisors (see below), whose sum is σ = 86970723840. Its totient is φ = 86744824320.

The previous prime is 86857774063. The next prime is 86857774121. The reversal of 86857774079 is 97047775868.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86857774079 - 2⁴ = 86857774063 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 (86857774039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56473727 + ... + 56475264.

It is an arithmetic number, because the mean of its divisors is an integer number (21742680960).

Almost surely, 2^86857774079 is an apocalyptic number.

86857774079 is a deficient number, since it is larger than the sum of its proper divisors (112949761).

86857774079 is a wasteful number, since it uses less digits than its factorization.

86857774079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112949760.

The product of its (nonzero) digits is 165957120, while the sum is 68.

The spelling of 86857774079 in words is "eighty-six billion, eight hundred fifty-seven million, seven hundred seventy-four thousand, seventy-nine".