52636535216621 has 4 divisors (see below), whose sum is σ = 52822530040992. Its totient is φ = 52450540392252.

The previous prime is 52636535216609. The next prime is 52636535216641. The reversal of 52636535216621 is 12661253563625.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52636535216621 - 2²⁶ = 52636468107757 is a prime.

It is a super-2 number, since 2×52636535216621² (a number of 28 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 (52636535216641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92997411761 + ... + 92997412326.

It is an arithmetic number, because the mean of its divisors is an integer number (13205632510248).

Almost surely, 2^{52636535216621} is an apocalyptic number.

It is an amenable number.

52636535216621 is a deficient number, since it is larger than the sum of its proper divisors (185994824371).

52636535216621 is a wasteful number, since it uses less digits than its factorization.

52636535216621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185994824370.

The product of its digits is 11664000, while the sum is 53.

The spelling of 52636535216621 in words is "fifty-two trillion, six hundred thirty-six billion, five hundred thirty-five million, two hundred sixteen thousand, six hundred twenty-one".