625064551 has 4 divisors (see below), whose sum is σ = 661833072. Its totient is φ = 588296032.

The previous prime is 625064497. The next prime is 625064581. The reversal of 625064551 is 155460526.

625064551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 625064551 - 2⁷ = 625064423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625064581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18384235 + ... + 18384268.

It is an arithmetic number, because the mean of its divisors is an integer number (165458268).

Almost surely, 2^625064551 is an apocalyptic number.

625064551 is a deficient number, since it is larger than the sum of its proper divisors (36768521).

625064551 is a wasteful number, since it uses less digits than its factorization.

625064551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36768520.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 625064551 is about 25001.2909866671. The cubic root of 625064551 is about 855.0174071670.

The spelling of 625064551 in words is "six hundred twenty-five million, sixty-four thousand, five hundred fifty-one".