3123426165520 has 40 divisors (see below), whose sum is σ = 7262050906584. Its totient is φ = 1249355830272.

The previous prime is 3123426165511. The next prime is 3123426165547. The reversal of 3123426165520 is 255616243213.

It can be written as a sum of positive squares in 4 ways, for example, as 18669396496 + 3104756769024 = 136636^2 + 1762032^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×3123426165520³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8912652 + ... + 9256468.

Almost surely, 2^{3123426165520} is an apocalyptic number.

It is an amenable number.

3123426165520 is an abundant number, since it is smaller than the sum of its proper divisors (4138624741064).

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

3123426165520 is a wasteful number, since it uses less digits than its factorization.

3123426165520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457387 (or 457381 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 3123426165520 in words is "three trillion, one hundred twenty-three billion, four hundred twenty-six million, one hundred sixty-five thousand, five hundred twenty".