640630600534 has 8 divisors (see below), whose sum is σ = 960957006408. Its totient is φ = 320311598400.

The previous prime is 640630600501. The next prime is 640630600543. The reversal of 640630600534 is 435006036046.

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

It is a junction number, because it is equal to n+sod(n) for n = 640630600493 and 640630600502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1629307 + ... + 1983910.

It is an arithmetic number, because the mean of its divisors is an integer number (120119625801).

Almost surely, 2^640630600534 is an apocalyptic number.

640630600534 is a deficient number, since it is larger than the sum of its proper divisors (320326405874).

640630600534 is a wasteful number, since it uses less digits than its factorization.

640630600534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3701870.

The product of its (nonzero) digits is 155520, while the sum is 37.

The spelling of 640630600534 in words is "six hundred forty billion, six hundred thirty million, six hundred thousand, five hundred thirty-four".