643625122 has 16 divisors (see below), whose sum is σ = 1104630912. Its totient is φ = 275520960.

The previous prime is 643625119. The next prime is 643625173. The reversal of 643625122 is 221526346.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13758 + ... + 38425.

It is an arithmetic number, because the mean of its divisors is an integer number (69039432).

Almost surely, 2^643625122 is an apocalyptic number.

643625122 is a deficient number, since it is larger than the sum of its proper divisors (461005790).

643625122 is a wasteful number, since it uses less digits than its factorization.

643625122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53073.

The product of its digits is 17280, while the sum is 31.

The square root of 643625122 is about 25369.7678743815. The cubic root of 643625122 is about 863.3979153283.

The spelling of 643625122 in words is "six hundred forty-three million, six hundred twenty-five thousand, one hundred twenty-two".