321612436561013 has 16 divisors (see below), whose sum is σ = 354706640002176. Its totient is φ = 289723465725120.

The previous prime is 321612436560997. The next prime is 321612436561033. The reversal of 321612436561013 is 310165634216123.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 321612436561013 - 2⁴ = 321612436560997 is a prime.

It is a super-2 number, since 2×321612436561013² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321612436561033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242919545 + ... + 244239902.

It is an arithmetic number, because the mean of its divisors is an integer number (22169165000136).

Almost surely, 2^{321612436561013} is an apocalyptic number.

It is an amenable number.

321612436561013 is a deficient number, since it is larger than the sum of its proper divisors (33094203441163).

321612436561013 is a wasteful number, since it uses less digits than its factorization.

321612436561013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487160684.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 321612436561013 in words is "three hundred twenty-one trillion, six hundred twelve billion, four hundred thirty-six million, five hundred sixty-one thousand, thirteen".