625625693857 has 2 divisors, whose sum is σ = 625625693858. Its totient is φ = 625625693856.

The previous prime is 625625693813. The next prime is 625625693879. The reversal of 625625693857 is 758396526526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 510837543441 + 114788150416 = 714729^2 + 338804^2 .

It is a cyclic number.

It is not a de Polignac number, because 625625693857 - 2¹⁹ = 625625169569 is a prime.

It is not a weakly prime, because it can be changed into another prime (625625699857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312812846928 + 312812846929.

It is an arithmetic number, because the mean of its divisors is an integer number (312812846929).

Almost surely, 2^625625693857 is an apocalyptic number.

It is an amenable number.

625625693857 is a deficient number, since it is larger than the sum of its proper divisors (1).

625625693857 is an equidigital number, since it uses as much as digits as its factorization.

625625693857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296000, while the sum is 64.

The spelling of 625625693857 in words is "six hundred twenty-five billion, six hundred twenty-five million, six hundred ninety-three thousand, eight hundred fifty-seven".