86251323165721 has 16 divisors (see below), whose sum is σ = 100883178998784. Its totient is φ = 72209537210304.

The previous prime is 86251323165713. The next prime is 86251323165739. The reversal of 86251323165721 is 12756132315268.

It is a cyclic number.

It is not a de Polignac number, because 86251323165721 - 2³ = 86251323165713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86251323162721) 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, 521180386 + ... + 521345851.

It is an arithmetic number, because the mean of its divisors is an integer number (6305198687424).

Almost surely, 2^{86251323165721} is an apocalyptic number.

It is an amenable number.

86251323165721 is a deficient number, since it is larger than the sum of its proper divisors (14631855833063).

86251323165721 is a wasteful number, since it uses less digits than its factorization.

86251323165721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042526520.

The product of its digits is 3628800, while the sum is 52.

The spelling of 86251323165721 in words is "eighty-six trillion, two hundred fifty-one billion, three hundred twenty-three million, one hundred sixty-five thousand, seven hundred twenty-one".