625025641 has 2 divisors, whose sum is σ = 625025642. Its totient is φ = 625025640.

The previous prime is 625025633. The next prime is 625025651. The reversal of 625025641 is 146520526.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624800016 + 225625 = 24996^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 625025641 - 2³ = 625025633 is a prime.

625025641 is a modest number, since divided by 25641 gives 625 as remainder.

It is equal to p_32561608 and since 625025641 and 32561608 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (625025651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312512820 + 312512821.

It is an arithmetic number, because the mean of its divisors is an integer number (312512821).

Almost surely, 2^625025641 is an apocalyptic number.

It is an amenable number.

625025641 is a deficient number, since it is larger than the sum of its proper divisors (1).

625025641 is an equidigital number, since it uses as much as digits as its factorization.

625025641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 625025641 is about 25000.5128147404. The cubic root of 625025641 is about 854.9996653100. Note that the first 3 decimals are identical.

The spelling of 625025641 in words is "six hundred twenty-five million, twenty-five thousand, six hundred forty-one".