831396401264 has 80 divisors (see below), whose sum is σ = 1893615884160. Its totient is φ = 348621684480.

The previous prime is 831396401243. The next prime is 831396401273. The reversal of 831396401264 is 462104693138.

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, 3610907 + ... + 3834245.

It is an arithmetic number, because the mean of its divisors is an integer number (23670198552).

Almost surely, 2^831396401264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 831396401264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (946807942080).

831396401264 is an abundant number, since it is smaller than the sum of its proper divisors (1062219482896).

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

831396401264 is a wasteful number, since it uses less digits than its factorization.

831396401264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224998 (or 224992 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The spelling of 831396401264 in words is "eight hundred thirty-one billion, three hundred ninety-six million, four hundred one thousand, two hundred sixty-four".