54756564521 has 4 divisors (see below), whose sum is σ = 56522905344. Its totient is φ = 52990223700.

The previous prime is 54756564509. The next prime is 54756564523. The reversal of 54756564521 is 12546565745.

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 54756564521 - 2¹⁰ = 54756563497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54756564521.

It is not an unprimeable number, because it can be changed into a prime (54756564523) 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, 883170365 + ... + 883170426.

It is an arithmetic number, because the mean of its divisors is an integer number (14130726336).

Almost surely, 2^54756564521 is an apocalyptic number.

It is an amenable number.

54756564521 is a deficient number, since it is larger than the sum of its proper divisors (1766340823).

54756564521 is a wasteful number, since it uses less digits than its factorization.

54756564521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766340822.

The product of its digits is 5040000, while the sum is 50.

The spelling of 54756564521 in words is "fifty-four billion, seven hundred fifty-six million, five hundred sixty-four thousand, five hundred twenty-one".