864713643997 has 16 divisors (see below), whose sum is σ = 1005640706560. Its totient is φ = 728194099248.

The previous prime is 864713643971. The next prime is 864713644009. The reversal of 864713643997 is 799346317468.

It is not a de Polignac number, because 864713643997 - 2⁷ = 864713643869 is a prime.

It is a super-2 number, since 2×864713643997² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864713643967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2254623 + ... + 2610124.

It is an arithmetic number, because the mean of its divisors is an integer number (62852544160).

Almost surely, 2^864713643997 is an apocalyptic number.

It is an amenable number.

864713643997 is a deficient number, since it is larger than the sum of its proper divisors (140927062563).

864713643997 is a wasteful number, since it uses less digits than its factorization.

864713643997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4865200.

The product of its digits is 164602368, while the sum is 67.

The spelling of 864713643997 in words is "eight hundred sixty-four billion, seven hundred thirteen million, six hundred forty-three thousand, nine hundred ninety-seven".