56545253132521 has 4 divisors (see below), whose sum is σ = 57341665148544. Its totient is φ = 55748841116500.

The previous prime is 56545253132509. The next prime is 56545253132539. The reversal of 56545253132521 is 12523135254565.

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 56545253132521 - 2¹⁷ = 56545253001449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56545253132551) 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, 398206007905 + ... + 398206008046.

It is an arithmetic number, because the mean of its divisors is an integer number (14335416287136).

Almost surely, 2^{56545253132521} is an apocalyptic number.

It is an amenable number.

56545253132521 is a deficient number, since it is larger than the sum of its proper divisors (796412016023).

56545253132521 is an equidigital number, since it uses as much as digits as its factorization.

56545253132521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796412016022.

The product of its digits is 5400000, while the sum is 49.

The spelling of 56545253132521 in words is "fifty-six trillion, five hundred forty-five billion, two hundred fifty-three million, one hundred thirty-two thousand, five hundred twenty-one".