12590721999 has 16 divisors (see below), whose sum is σ = 18824053600. Its totient is φ = 8316805248.

The previous prime is 12590721977. The next prime is 12590722009. The reversal of 12590721999 is 99912709521.

It is not a de Polignac number, because 12590721999 - 2⁵ = 12590721967 is a prime.

It is a super-2 number, since 2×12590721999² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12590721919) 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, 2136154 + ... + 2142039.

It is an arithmetic number, because the mean of its divisors is an integer number (1176503350).

Almost surely, 2^12590721999 is an apocalyptic number.

12590721999 is a deficient number, since it is larger than the sum of its proper divisors (6233331601).

12590721999 is a wasteful number, since it uses less digits than its factorization.

12590721999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4278311 (or 4278305 counting only the distinct ones).

The product of its (nonzero) digits is 918540, while the sum is 54.

The spelling of 12590721999 in words is "twelve billion, five hundred ninety million, seven hundred twenty-one thousand, nine hundred ninety-nine".