52805136641 has 4 divisors (see below), whose sum is σ = 53121335232. Its totient is φ = 52488938052.

The previous prime is 52805136613. The next prime is 52805136647. The reversal of 52805136641 is 14663150825.

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 a de Polignac number, because none of the positive numbers 2^k-52805136641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52805136647) 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, 158099045 + ... + 158099378.

It is an arithmetic number, because the mean of its divisors is an integer number (13280333808).

Almost surely, 2^52805136641 is an apocalyptic number.

It is an amenable number.

52805136641 is a deficient number, since it is larger than the sum of its proper divisors (316198591).

52805136641 is a wasteful number, since it uses less digits than its factorization.

52805136641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316198590.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 52805136641 in words is "fifty-two billion, eight hundred five million, one hundred thirty-six thousand, six hundred forty-one".