56787746381 has 4 divisors (see below), whose sum is σ = 57995996352. Its totient is φ = 55579496412.

The previous prime is 56787746377. The next prime is 56787746417. The reversal of 56787746381 is 18364778765.

56787746381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56787746381 - 2² = 56787746377 is a prime.

It is a super-2 number, since 2×56787746381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56787746681) 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, 604124915 + ... + 604125008.

It is an arithmetic number, because the mean of its divisors is an integer number (14498999088).

Almost surely, 2^56787746381 is an apocalyptic number.

It is an amenable number.

56787746381 is a deficient number, since it is larger than the sum of its proper divisors (1208249971).

56787746381 is a wasteful number, since it uses less digits than its factorization.

56787746381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208249970.

The product of its digits is 47416320, while the sum is 62.

The spelling of 56787746381 in words is "fifty-six billion, seven hundred eighty-seven million, seven hundred forty-six thousand, three hundred eighty-one".