56781694545 has 8 divisors (see below), whose sum is σ = 90850711296. Its totient is φ = 30283570416.

The previous prime is 56781694523. The next prime is 56781694553. The reversal of 56781694545 is 54549618765.

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

It is not a de Polignac number, because 56781694545 - 2⁸ = 56781694289 is a prime.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1892723137 + ... + 1892723166.

It is an arithmetic number, because the mean of its divisors is an integer number (11356338912).

Almost surely, 2^56781694545 is an apocalyptic number.

It is an amenable number.

56781694545 is a deficient number, since it is larger than the sum of its proper divisors (34069016751).

56781694545 is a wasteful number, since it uses less digits than its factorization.

56781694545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3785446311.

The product of its digits is 36288000, while the sum is 60.

The spelling of 56781694545 in words is "fifty-six billion, seven hundred eighty-one million, six hundred ninety-four thousand, five hundred forty-five".