840764681128 has 64 divisors (see below), whose sum is σ = 1670175221760. Its totient is φ = 395949318336.

The previous prime is 840764681087. The next prime is 840764681173. The reversal of 840764681128 is 821186467048.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35579125 + ... + 35602747.

It is an arithmetic number, because the mean of its divisors is an integer number (26096487840).

Almost surely, 2^840764681128 is an apocalyptic number.

It is an amenable number.

840764681128 is a deficient number, since it is larger than the sum of its proper divisors (829410540632).

840764681128 is a wasteful number, since it uses less digits than its factorization.

840764681128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26606 (or 26602 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 55.

The spelling of 840764681128 in words is "eight hundred forty billion, seven hundred sixty-four million, six hundred eighty-one thousand, one hundred twenty-eight".