126400506631 has 16 divisors (see below), whose sum is σ = 144706590720. Its totient is φ = 108156811680.

The previous prime is 126400506619. The next prime is 126400506643. The reversal of 126400506631 is 136605004621.

It is an interprime number because it is at equal distance from previous prime (126400506619) and next prime (126400506643).

It is a cyclic number.

It is not a de Polignac number, because 126400506631 - 2⁵ = 126400506599 is a prime.

It is a super-2 number, since 2×126400506631² (a number of 23 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 (126400506601) 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, 10681540 + ... + 10693366.

It is an arithmetic number, because the mean of its divisors is an integer number (9044161920).

Almost surely, 2^126400506631 is an apocalyptic number.

126400506631 is a deficient number, since it is larger than the sum of its proper divisors (18306084089).

126400506631 is a wasteful number, since it uses less digits than its factorization.

126400506631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14334.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 126400506631 in words is "one hundred twenty-six billion, four hundred million, five hundred six thousand, six hundred thirty-one".