811377615984 has 160 divisors (see below), whose sum is σ = 2264246745600. Its totient is φ = 248887102464.

The previous prime is 811377615959. The next prime is 811377615989. The reversal of 811377615984 is 489516773118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811377615989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 419749482 + ... + 419751414.

It is an arithmetic number, because the mean of its divisors is an integer number (14151542160).

Almost surely, 2^811377615984 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 811377615984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1132123372800).

811377615984 is an abundant number, since it is smaller than the sum of its proper divisors (1452869129616).

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

811377615984 is a wasteful number, since it uses less digits than its factorization.

811377615984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679 (or 3673 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 60.

The spelling of 811377615984 in words is "eight hundred eleven billion, three hundred seventy-seven million, six hundred fifteen thousand, nine hundred eighty-four".