8001817477792 has 24 divisors (see below), whose sum is σ = 15763369173300. Its totient is φ = 3998422132224.

The previous prime is 8001817477781. The next prime is 8001817477811. The reversal of 8001817477792 is 2977747181008.

It can be written as a sum of positive squares in 2 ways, for example, as 7774483052176 + 227334425616 = 2788276^2 + 476796^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8001817477792.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77654167 + ... + 77757142.

Almost surely, 2^{8001817477792} is an apocalyptic number.

It is an amenable number.

8001817477792 is a deficient number, since it is larger than the sum of its proper divisors (7761551695508).

8001817477792 is a wasteful number, since it uses less digits than its factorization.

8001817477792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155412928 (or 155412920 counting only the distinct ones).

The product of its (nonzero) digits is 11063808, while the sum is 61.

The spelling of 8001817477792 in words is "eight trillion, one billion, eight hundred seventeen million, four hundred seventy-seven thousand, seven hundred ninety-two".