640613476334 has 24 divisors (see below), whose sum is σ = 1053694294560. Its totient is φ = 291925116288.

The previous prime is 640613476333. The next prime is 640613476351. The reversal of 640613476334 is 433674316046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640613476333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11968907 + ... + 12022310.

It is an arithmetic number, because the mean of its divisors is an integer number (43903928940).

Almost surely, 2^640613476334 is an apocalyptic number.

640613476334 is a deficient number, since it is larger than the sum of its proper divisors (413080818226).

640613476334 is a wasteful number, since it uses less digits than its factorization.

640613476334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23991324 (or 23991311 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 47.

The spelling of 640613476334 in words is "six hundred forty billion, six hundred thirteen million, four hundred seventy-six thousand, three hundred thirty-four".