126400044109931 has 2 divisors, whose sum is σ = 126400044109932. Its totient is φ = 126400044109930.

The previous prime is 126400044109841. The next prime is 126400044109943. The reversal of 126400044109931 is 139901440004621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126400044109931 is a prime.

It is a super-2 number, since 2×126400044109931² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (126400044109531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63200022054965 + 63200022054966.

It is an arithmetic number, because the mean of its divisors is an integer number (63200022054966).

Almost surely, 2^{126400044109931} is an apocalyptic number.

126400044109931 is a deficient number, since it is larger than the sum of its proper divisors (1).

126400044109931 is an equidigital number, since it uses as much as digits as its factorization.

126400044109931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 126400044109931 in words is "one hundred twenty-six trillion, four hundred billion, forty-four million, one hundred nine thousand, nine hundred thirty-one".