125818009831 has 2 divisors, whose sum is σ = 125818009832. Its totient is φ = 125818009830.

The previous prime is 125818009717. The next prime is 125818009873. The reversal of 125818009831 is 138900818521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125818009831 - 2⁹ = 125818009319 is a prime.

It is a super-2 number, since 2×125818009831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125818009231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62909004915 + 62909004916.

It is an arithmetic number, because the mean of its divisors is an integer number (62909004916).

Almost surely, 2^125818009831 is an apocalyptic number.

125818009831 is a deficient number, since it is larger than the sum of its proper divisors (1).

125818009831 is an equidigital number, since it uses as much as digits as its factorization.

125818009831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 46.

The spelling of 125818009831 in words is "one hundred twenty-five billion, eight hundred eighteen million, nine thousand, eight hundred thirty-one".