56775739847 has 4 divisors (see below), whose sum is σ = 56938421400. Its totient is φ = 56613058296.

The previous prime is 56775739831. The next prime is 56775739871. The reversal of 56775739847 is 74893757765.

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

It is a cyclic number.

It is not a de Polignac number, because 56775739847 - 2⁴ = 56775739831 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 (56775739147) 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, 81340253 + ... + 81340950.

It is an arithmetic number, because the mean of its divisors is an integer number (14234605350).

Almost surely, 2^56775739847 is an apocalyptic number.

56775739847 is a deficient number, since it is larger than the sum of its proper divisors (162681553).

56775739847 is a wasteful number, since it uses less digits than its factorization.

56775739847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162681552.

The product of its digits is 311169600, while the sum is 68.

The spelling of 56775739847 in words is "fifty-six billion, seven hundred seventy-five million, seven hundred thirty-nine thousand, eight hundred forty-seven".