52136366621 has 2 divisors, whose sum is σ = 52136366622. Its totient is φ = 52136366620.

The previous prime is 52136366617. The next prime is 52136366687. The reversal of 52136366621 is 12666363125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41912325625 + 10224040996 = 204725^2 + 101114^2 .

It is a cyclic number.

It is not a de Polignac number, because 52136366621 - 2² = 52136366617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52136366221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26068183310 + 26068183311.

It is an arithmetic number, because the mean of its divisors is an integer number (26068183311).

Almost surely, 2^52136366621 is an apocalyptic number.

It is an amenable number.

52136366621 is a deficient number, since it is larger than the sum of its proper divisors (1).

52136366621 is an equidigital number, since it uses as much as digits as its factorization.

52136366621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 41.

The spelling of 52136366621 in words is "fifty-two billion, one hundred thirty-six million, three hundred sixty-six thousand, six hundred twenty-one".