634625613 has 12 divisors (see below), whose sum is σ = 917399808. Its totient is φ = 422752200.

The previous prime is 634625603. The next prime is 634625617. The reversal of 634625613 is 316526436.

634625613 is a `hidden beast` number, since 6 + 34 + 6 + 2 + 5 + 613 = 666.

It is not a de Polignac number, because 634625613 - 2⁴ = 634625597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634625617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15213 + ... + 38738.

It is an arithmetic number, because the mean of its divisors is an integer number (76449984).

Almost surely, 2^634625613 is an apocalyptic number.

It is an amenable number.

634625613 is a deficient number, since it is larger than the sum of its proper divisors (282774195).

634625613 is a wasteful number, since it uses less digits than its factorization.

634625613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55264 (or 55261 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 634625613 is about 25191.7766939928. The cubic root of 634625613 is about 859.3548492077.

The spelling of 634625613 in words is "six hundred thirty-four million, six hundred twenty-five thousand, six hundred thirteen".