811377776 has 80 divisors (see below), whose sum is σ = 1799884800. Its totient is φ = 350918400.

The previous prime is 811377761. The next prime is 811377817. The reversal of 811377776 is 677773118.

Its product of digits (345744) is a multiple of the sum of its prime divisors (2352).

It is a self number, because there is not a number n which added to its sum of digits gives 811377776.

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, 361265 + ... + 363503.

It is an arithmetic number, because the mean of its divisors is an integer number (22498560).

Almost surely, 2^811377776 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 811377776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (899942400).

811377776 is an abundant number, since it is smaller than the sum of its proper divisors (988507024).

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

811377776 is a wasteful number, since it uses less digits than its factorization.

811377776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358 (or 2352 counting only the distinct ones).

The product of its digits is 345744, while the sum is 47.

The square root of 811377776 is about 28484.6937143442. The cubic root of 811377776 is about 932.6979796080.

The spelling of 811377776 in words is "eight hundred eleven million, three hundred seventy-seven thousand, seven hundred seventy-six".