811913609712 has 160 divisors (see below), whose sum is σ = 2221502656000. Its totient is φ = 254809691136.

The previous prime is 811913609687. The next prime is 811913609737. The reversal of 811913609712 is 217906319118.

It is an interprime number because it is at equal distance from previous prime (811913609687) and next prime (811913609737).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198364338 + ... + 198368430.

It is an arithmetic number, because the mean of its divisors is an integer number (13884391600).

Almost surely, 2^811913609712 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 811913609712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1110751328000).

811913609712 is an abundant number, since it is smaller than the sum of its proper divisors (1409589046288).

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

811913609712 is a wasteful number, since it uses less digits than its factorization.

811913609712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5415 (or 5409 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 48.

The spelling of 811913609712 in words is "eight hundred eleven billion, nine hundred thirteen million, six hundred nine thousand, seven hundred twelve".