56521000465445 has 4 divisors (see below), whose sum is σ = 67825200558540. Its totient is φ = 45216800372352.

The previous prime is 56521000465313. The next prime is 56521000465453. The reversal of 56521000465445 is 54456400012565.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18440857895524 + 38080142569921 = 4294282^2 + 6170911^2 .

It is a cyclic number.

It is not a de Polignac number, because 56521000465445 - 2²² = 56520996271141 is a prime.

It is a super-2 number, since 2×56521000465445² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56521000465445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5652100046540 + ... + 5652100046549.

It is an arithmetic number, because the mean of its divisors is an integer number (16956300139635).

Almost surely, 2^{56521000465445} is an apocalyptic number.

It is an amenable number.

56521000465445 is a deficient number, since it is larger than the sum of its proper divisors (11304200093095).

56521000465445 is a wasteful number, since it uses less digits than its factorization.

56521000465445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11304200093094.

The product of its (nonzero) digits is 2880000, while the sum is 47.

The spelling of 56521000465445 in words is "fifty-six trillion, five hundred twenty-one billion, four hundred sixty-five thousand, four hundred forty-five".