640635058 has 8 divisors (see below), whose sum is σ = 1098231552. Its totient is φ = 274557876.

The previous prime is 640635053. The next prime is 640635091. The reversal of 640635058 is 850536046.

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

It is not an unprimeable number, because it can be changed into a prime (640635053) 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, 22879810 + ... + 22879837.

It is an arithmetic number, because the mean of its divisors is an integer number (137278944).

Almost surely, 2^640635058 is an apocalyptic number.

640635058 is a deficient number, since it is larger than the sum of its proper divisors (457596494).

640635058 is a wasteful number, since it uses less digits than its factorization.

640635058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45759656.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 640635058 is about 25310.7696050515. The cubic root of 640635058 is about 862.0588215737.

The spelling of 640635058 in words is "six hundred forty million, six hundred thirty-five thousand, fifty-eight".