612320052066021 has 24 divisors (see below), whose sum is σ = 961236371255160. Its totient is φ = 373355345782656.

The previous prime is 612320052066017. The next prime is 612320052066053. The reversal of 612320052066021 is 120660250023216.

612320052066021 is a `hidden beast` number, since 6 + 1 + 2 + 3 + 20 + 0 + 5 + 20 + 6 + 602 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 221824116725121 + 390495935340900 = 14893761^2 + 19760970^2 .

It is not a de Polignac number, because 612320052066021 - 2² = 612320052066017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612320052066061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24006889626 + ... + 24006915131.

It is an arithmetic number, because the mean of its divisors is an integer number (40051515468965).

Almost surely, 2^{612320052066021} is an apocalyptic number.

It is an amenable number.

612320052066021 is a deficient number, since it is larger than the sum of its proper divisors (348916319189139).

612320052066021 is a wasteful number, since it uses less digits than its factorization.

612320052066021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48013804885 (or 48013804882 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 612320052066021 in words is "six hundred twelve trillion, three hundred twenty billion, fifty-two million, sixty-six thousand, twenty-one".