56781694547 has 8 divisors (see below), whose sum is σ = 56838667200. Its totient is φ = 56724753384.

The previous prime is 56781694523. The next prime is 56781694553. The reversal of 56781694547 is 74549618765.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56781694547 - 2²² = 56777500243 is a prime.

It is an alternating number because its digits alternate between odd and even.

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 56781694547.

It is not an unprimeable number, because it can be changed into a prime (56781694507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5128904 + ... + 5139962.

It is an arithmetic number, because the mean of its divisors is an integer number (7104833400).

Almost surely, 2^56781694547 is an apocalyptic number.

56781694547 is a deficient number, since it is larger than the sum of its proper divisors (56972653).

56781694547 is a wasteful number, since it uses less digits than its factorization.

56781694547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15745.

The product of its digits is 50803200, while the sum is 62.

The spelling of 56781694547 in words is "fifty-six billion, seven hundred eighty-one million, six hundred ninety-four thousand, five hundred forty-seven".