5311621324512 has 36 divisors (see below), whose sum is σ = 15104923142400. Its totient is φ = 1770540441408.

The previous prime is 5311621324483. The next prime is 5311621324517. The reversal of 5311621324512 is 2154231261135.

5311621324512 is a `hidden beast` number, since 5 + 3 + 1 + 1 + 6 + 2 + 132 + 4 + 512 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×5311621324512² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5311621324517) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9221564512 + ... + 9221565087.

It is an arithmetic number, because the mean of its divisors is an integer number (419581198400).

Almost surely, 2^{5311621324512} is an apocalyptic number.

It is an amenable number.

5311621324512 is an abundant number, since it is smaller than the sum of its proper divisors (9793301817888).

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

5311621324512 is a wasteful number, since it uses less digits than its factorization.

5311621324512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18443129615 (or 18443129604 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

Adding to 5311621324512 its reverse (2154231261135), we get a palindrome (7465852585647).

The spelling of 5311621324512 in words is "five trillion, three hundred eleven billion, six hundred twenty-one million, three hundred twenty-four thousand, five hundred twelve".