125144644957 has 2 divisors, whose sum is σ = 125144644958. Its totient is φ = 125144644956.

The previous prime is 125144644939. The next prime is 125144645047. The reversal of 125144644957 is 759446441521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109044587961 + 16100056996 = 330219^2 + 126886^2 .

It is an emirp because it is prime and its reverse (759446441521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125144644957 - 2²⁷ = 125010427229 is a prime.

It is a super-2 number, since 2×125144644957² (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 (125144644927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62572322478 + 62572322479.

It is an arithmetic number, because the mean of its divisors is an integer number (62572322479).

Almost surely, 2^125144644957 is an apocalyptic number.

It is an amenable number.

125144644957 is a deficient number, since it is larger than the sum of its proper divisors (1).

125144644957 is an equidigital number, since it uses as much as digits as its factorization.

125144644957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4838400, while the sum is 52.

The spelling of 125144644957 in words is "one hundred twenty-five billion, one hundred forty-four million, six hundred forty-four thousand, nine hundred fifty-seven".