625320561 has 16 divisors (see below), whose sum is σ = 881653248. Its totient is φ = 393590400.

The previous prime is 625320541. The next prime is 625320583. The reversal of 625320561 is 165023526.

It is not a de Polignac number, because 625320561 - 2⁵ = 625320529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (625320511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78186 + ... + 85811.

It is an arithmetic number, because the mean of its divisors is an integer number (55103328).

Almost surely, 2^625320561 is an apocalyptic number.

It is an amenable number.

625320561 is a deficient number, since it is larger than the sum of its proper divisors (256332687).

625320561 is a wasteful number, since it uses less digits than its factorization.

625320561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164072.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 625320561 is about 25006.4103981359. The cubic root of 625320561 is about 855.1341221146.

The spelling of 625320561 in words is "six hundred twenty-five million, three hundred twenty thousand, five hundred sixty-one".