811012327657 has 12 divisors (see below), whose sum is σ = 975954315780. Its totient is φ = 671182614816.

The previous prime is 811012327637. The next prime is 811012327661. The reversal of 811012327657 is 756723210118.

It can be written as a sum of positive squares in 2 ways, for example, as 484166864041 + 326845463616 = 695821^2 + 571704^2 .

It is not a de Polignac number, because 811012327657 - 2¹⁵ = 811012294889 is a prime.

It is a super-2 number, since 2×811012327657² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (811012327637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285365338 + ... + 285368179.

It is an arithmetic number, because the mean of its divisors is an integer number (81329526315).

Almost surely, 2^811012327657 is an apocalyptic number.

It is an amenable number.

811012327657 is a deficient number, since it is larger than the sum of its proper divisors (164941988123).

811012327657 is a wasteful number, since it uses less digits than its factorization.

811012327657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570733560 (or 570733553 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 811012327657 in words is "eight hundred eleven billion, twelve million, three hundred twenty-seven thousand, six hundred fifty-seven".