625755643 has 2 divisors, whose sum is σ = 625755644. Its totient is φ = 625755642.

The previous prime is 625755623. The next prime is 625755673. The reversal of 625755643 is 346557526.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625755643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 625755643.

It is not a weakly prime, because it can be changed into another prime (625755623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312877821 + 312877822.

It is an arithmetic number, because the mean of its divisors is an integer number (312877822).

Almost surely, 2^625755643 is an apocalyptic number.

625755643 is a deficient number, since it is larger than the sum of its proper divisors (1).

625755643 is an equidigital number, since it uses as much as digits as its factorization.

625755643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756000, while the sum is 43.

The square root of 625755643 is about 25015.1082947886. The cubic root of 625755643 is about 855.3324029283.

The spelling of 625755643 in words is "six hundred twenty-five million, seven hundred fifty-five thousand, six hundred forty-three".