86891429691 has 24 divisors (see below), whose sum is σ = 137110371840. Its totient is φ = 52588186800.

The previous prime is 86891429671. The next prime is 86891429699. The reversal of 86891429691 is 19692419868.

86891429691 is a `hidden beast` number, since 8 + 68 + 91 + 429 + 69 + 1 = 666.

It is not a de Polignac number, because 86891429691 - 2⁷ = 86891429563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86891429699) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 539175 + ... + 681536.

It is an arithmetic number, because the mean of its divisors is an integer number (5712932160).

Almost surely, 2^86891429691 is an apocalyptic number.

86891429691 is a deficient number, since it is larger than the sum of its proper divisors (50218942149).

86891429691 is a wasteful number, since it uses less digits than its factorization.

86891429691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221447 (or 1221444 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 63.

The spelling of 86891429691 in words is "eighty-six billion, eight hundred ninety-one million, four hundred twenty-nine thousand, six hundred ninety-one".