83121088365856 has 12 divisors (see below), whose sum is σ = 163644642720342. Its totient is φ = 41560544182912.

The previous prime is 83121088365793. The next prime is 83121088365941. The reversal of 83121088365856 is 65856388012138.

It can be written as a sum of positive squares in only one way, i.e., 74247243155856 + 8873845210000 = 8616684^2 + 2978900^2 .

It is a super-2 number, since 2×83121088365856² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1298767005685 + ... + 1298767005748.

Almost surely, 2^{83121088365856} is an apocalyptic number.

It is an amenable number.

83121088365856 is a deficient number, since it is larger than the sum of its proper divisors (80523554354486).

83121088365856 is a wasteful number, since it uses less digits than its factorization.

83121088365856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597534011443 (or 2597534011435 counting only the distinct ones).

The product of its (nonzero) digits is 66355200, while the sum is 64.

The spelling of 83121088365856 in words is "eighty-three trillion, one hundred twenty-one billion, eighty-eight million, three hundred sixty-five thousand, eight hundred fifty-six".