640386464683046 has 16 divisors (see below), whose sum is σ = 963057457580400. Its totient is φ = 319367326522848.

The previous prime is 640386464683039. The next prime is 640386464683073.

640386464683046 is nontrivially palindromic in base 10.

It is a congruent 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, 87090560 + ... + 94156988.

It is an arithmetic number, because the mean of its divisors is an integer number (60191091098775).

Almost surely, 2^{640386464683046} is an apocalyptic number.

640386464683046 is a deficient number, since it is larger than the sum of its proper divisors (322670992897354).

640386464683046 is a wasteful number, since it uses less digits than its factorization.

640386464683046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7183303.

The product of its (nonzero) digits is 1146617856, while the sum is 68.

The spelling of 640386464683046 in words is "six hundred forty trillion, three hundred eighty-six billion, four hundred sixty-four million, six hundred eighty-three thousand, forty-six".