12506290731 has 48 divisors (see below), whose sum is σ = 20469915648. Its totient is φ = 7567279200.

The previous prime is 12506290691. The next prime is 12506290747. The reversal of 12506290731 is 13709260521.

12506290731 is a `hidden beast` number, since 1 + 25 + 0 + 629 + 0 + 7 + 3 + 1 = 666.

It is not a de Polignac number, because 12506290731 - 2²⁵ = 12472736299 is a prime.

It is a super-2 number, since 2×12506290731² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12506290781) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1806166 + ... + 1813076.

It is an arithmetic number, because the mean of its divisors is an integer number (426456576).

Almost surely, 2^12506290731 is an apocalyptic number.

12506290731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12506290731 is a deficient number, since it is larger than the sum of its proper divisors (7963624917).

12506290731 is an equidigital number, since it uses as much as digits as its factorization.

12506290731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7614 (or 7602 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 12506290731 in words is "twelve billion, five hundred six million, two hundred ninety thousand, seven hundred thirty-one".