625209655 has 8 divisors (see below), whose sum is σ = 857430432. Its totient is φ = 428715168.

The previous prime is 625209653. The next prime is 625209661. The reversal of 625209655 is 556902526.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 625209655 - 2¹ = 625209653 is a prime.

It is a super-2 number, since 2×625209655² = 781774225410438050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625209653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8931532 + ... + 8931601.

It is an arithmetic number, because the mean of its divisors is an integer number (107178804).

Almost surely, 2^625209655 is an apocalyptic number.

625209655 is a deficient number, since it is larger than the sum of its proper divisors (232220777).

625209655 is a wasteful number, since it uses less digits than its factorization.

625209655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17863145.

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 625209655 is about 25004.1927484172. The cubic root of 625209655 is about 855.0835639858.

The spelling of 625209655 in words is "six hundred twenty-five million, two hundred nine thousand, six hundred fifty-five".