56813861894399 has 4 divisors (see below), whose sum is σ = 56813878051536. Its totient is φ = 56813845737264.

The previous prime is 56813861894341. The next prime is 56813861894411. The reversal of 56813861894399 is 99349816831865.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56813861894399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56813861891399) 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, 320894 + ... + 10664459.

It is an arithmetic number, because the mean of its divisors is an integer number (14203469512884).

Almost surely, 2^{56813861894399} is an apocalyptic number.

56813861894399 is a deficient number, since it is larger than the sum of its proper divisors (16157137).

56813861894399 is a wasteful number, since it uses less digits than its factorization.

56813861894399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16157136.

The product of its digits is 2418647040, while the sum is 80.

The spelling of 56813861894399 in words is "fifty-six trillion, eight hundred thirteen billion, eight hundred sixty-one million, eight hundred ninety-four thousand, three hundred ninety-nine".