625815061 has 2 divisors, whose sum is σ = 625815062. Its totient is φ = 625815060.

The previous prime is 625815053. The next prime is 625815083. The reversal of 625815061 is 160518526.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 333610225 + 292204836 = 18265^2 + 17094^2 .

It is a cyclic number.

It is not a de Polignac number, because 625815061 - 2³ = 625815053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625815961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312907530 + 312907531.

It is an arithmetic number, because the mean of its divisors is an integer number (312907531).

Almost surely, 2^625815061 is an apocalyptic number.

It is an amenable number.

625815061 is a deficient number, since it is larger than the sum of its proper divisors (1).

625815061 is an equidigital number, since it uses as much as digits as its factorization.

625815061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 625815061 is about 25016.2959088671. The cubic root of 625815061 is about 855.3594744819.

The spelling of 625815061 in words is "six hundred twenty-five million, eight hundred fifteen thousand, sixty-one".