811937957776 has 45 divisors (see below), whose sum is σ = 1729227104283. Its totient is φ = 369044686560.

The previous prime is 811937957771. The next prime is 811937957783. The reversal of 811937957776 is 677759739118.

The square root of 811937957776 is 901076.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (811937957771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39637105 + ... + 39657583.

Almost surely, 2^811937957776 is an apocalyptic number.

811937957776 is the 901076-th square number.

It is an amenable number.

811937957776 is an abundant number, since it is smaller than the sum of its proper divisors (917289146507).

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

811937957776 is an frugal number, since it uses more digits than its factorization.

811937957776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40988 (or 20492 counting only the distinct ones).

The product of its digits is 140026320, while the sum is 70.

The spelling of 811937957776 in words is "eight hundred eleven billion, nine hundred thirty-seven million, nine hundred fifty-seven thousand, seven hundred seventy-six".