831640563534 has 32 divisors (see below), whose sum is σ = 1814540851584. Its totient is φ = 252005021280.

The previous prime is 831640563517. The next prime is 831640563553. The reversal of 831640563534 is 435365046138.

It is a congruent number.

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, 2398632 + ... + 2723364.

It is an arithmetic number, because the mean of its divisors is an integer number (56704401612).

Almost surely, 2^831640563534 is an apocalyptic number.

831640563534 is an abundant number, since it is smaller than the sum of its proper divisors (982900288050).

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

831640563534 is a wasteful number, since it uses less digits than its factorization.

831640563534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363552.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 831640563534 in words is "eight hundred thirty-one billion, six hundred forty million, five hundred sixty-three thousand, five hundred thirty-four".