56367174656521 has 4 divisors (see below), whose sum is σ = 56393551436692. Its totient is φ = 56340797876352.

The previous prime is 56367174656473. The next prime is 56367174656543. The reversal of 56367174656521 is 12565647176365.

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 702518890896 + 55664655765625 = 838164^2 + 7460875^2 .

It is a cyclic number.

It is not a de Polignac number, because 56367174656521 - 2¹³ = 56367174648329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56367174666521) 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, 13188386880 + ... + 13188391153.

It is an arithmetic number, because the mean of its divisors is an integer number (14098387859173).

Almost surely, 2^{56367174656521} is an apocalyptic number.

It is an amenable number.

56367174656521 is a deficient number, since it is larger than the sum of its proper divisors (26376780171).

56367174656521 is a wasteful number, since it uses less digits than its factorization.

56367174656521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26376780170.

The product of its digits is 190512000, while the sum is 64.

The spelling of 56367174656521 in words is "fifty-six trillion, three hundred sixty-seven billion, one hundred seventy-four million, six hundred fifty-six thousand, five hundred twenty-one".