1625133857 has 2 divisors, whose sum is σ = 1625133858. Its totient is φ = 1625133856.

The previous prime is 1625133841. The next prime is 1625133877. The reversal of 1625133857 is 7583315261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1233133456 + 392000401 = 35116^2 + 19799^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625133857 - 2⁴ = 1625133841 is a prime.

It is not a weakly prime, because it can be changed into another prime (1625133817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812566928 + 812566929.

It is an arithmetic number, because the mean of its divisors is an integer number (812566929).

Almost surely, 2^1625133857 is an apocalyptic number.

It is an amenable number.

1625133857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625133857 is an equidigital number, since it uses as much as digits as its factorization.

1625133857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 41.

The square root of 1625133857 is about 40312.9489990499. The cubic root of 1625133857 is about 1175.6996242671.

The spelling of 1625133857 in words is "one billion, six hundred twenty-five million, one hundred thirty-three thousand, eight hundred fifty-seven".