864365721499 has 8 divisors (see below), whose sum is σ = 987853920480. Its totient is φ = 740879367936.

The previous prime is 864365721493. The next prime is 864365721539. The reversal of 864365721499 is 994127563468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 864365721499 - 2⁵ = 864365721467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864365721499.

It is not an unprimeable number, because it can be changed into a prime (864365721493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 756747 + ... + 1517035.

It is an arithmetic number, because the mean of its divisors is an integer number (123481740060).

Almost surely, 2^864365721499 is an apocalyptic number.

864365721499 is a deficient number, since it is larger than the sum of its proper divisors (123488198981).

864365721499 is a wasteful number, since it uses less digits than its factorization.

864365721499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922709.

The product of its digits is 78382080, while the sum is 64.

The spelling of 864365721499 in words is "eight hundred sixty-four billion, three hundred sixty-five million, seven hundred twenty-one thousand, four hundred ninety-nine".