640227604074 has 16 divisors (see below), whose sum is σ = 1281539435040. Its totient is φ = 213228496880.

The previous prime is 640227604039. The next prime is 640227604087. The reversal of 640227604074 is 470406722046.

It is a happy number.

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, 45168444 + ... + 45182615.

It is an arithmetic number, because the mean of its divisors is an integer number (80096214690).

Almost surely, 2^640227604074 is an apocalyptic number.

640227604074 is an abundant number, since it is smaller than the sum of its proper divisors (641311830966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640227604074 is a wasteful number, since it uses less digits than its factorization.

640227604074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90352245.

The product of its (nonzero) digits is 451584, while the sum is 42.

The spelling of 640227604074 in words is "six hundred forty billion, two hundred twenty-seven million, six hundred four thousand, seventy-four".