625606738157 has 2 divisors, whose sum is σ = 625606738158. Its totient is φ = 625606738156.

The previous prime is 625606738129. The next prime is 625606738193. The reversal of 625606738157 is 751837606526.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 562209037636 + 63397700521 = 749806^2 + 251789^2 .

It is a cyclic number.

It is not a de Polignac number, because 625606738157 - 2⁶ = 625606738093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625606738457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312803369078 + 312803369079.

It is an arithmetic number, because the mean of its divisors is an integer number (312803369079).

Almost surely, 2^625606738157 is an apocalyptic number.

It is an amenable number.

625606738157 is a deficient number, since it is larger than the sum of its proper divisors (1).

625606738157 is an equidigital number, since it uses as much as digits as its factorization.

625606738157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 625606738157 in words is "six hundred twenty-five billion, six hundred six million, seven hundred thirty-eight thousand, one hundred fifty-seven".