1625503634957 has 2 divisors, whose sum is σ = 1625503634958. Its totient is φ = 1625503634956.

The previous prime is 1625503634927. The next prime is 1625503635089. The reversal of 1625503634957 is 7594363055261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1151084368996 + 474419265961 = 1072886^2 + 688781^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625503634957 - 2⁶ = 1625503634893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625503634927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812751817478 + 812751817479.

It is an arithmetic number, because the mean of its divisors is an integer number (812751817479).

Almost surely, 2^{1625503634957} is an apocalyptic number.

It is an amenable number.

1625503634957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625503634957 is an equidigital number, since it uses as much as digits as its factorization.

1625503634957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412000, while the sum is 56.

The spelling of 1625503634957 in words is "one trillion, six hundred twenty-five billion, five hundred three million, six hundred thirty-four thousand, nine hundred fifty-seven".