86918647923 has 6 divisors (see below), whose sum is σ = 125549158124. Its totient is φ = 57945765276.

The previous prime is 86918647919. The next prime is 86918647961. The reversal of 86918647923 is 32974681968.

86918647923 is a `hidden beast` number, since 8 + 69 + 1 + 86 + 479 + 23 = 666.

It is not a de Polignac number, because 86918647923 - 2² = 86918647919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86918647903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4828813765 + ... + 4828813782.

Almost surely, 2^86918647923 is an apocalyptic number.

86918647923 is a deficient number, since it is larger than the sum of its proper divisors (38630510201).

86918647923 is a wasteful number, since it uses less digits than its factorization.

86918647923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9657627553 (or 9657627550 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The spelling of 86918647923 in words is "eighty-six billion, nine hundred eighteen million, six hundred forty-seven thousand, nine hundred twenty-three".