56781117767 has 32 divisors (see below), whose sum is σ = 65945746944. Its totient is φ = 48317644800.

The previous prime is 56781117737. The next prime is 56781117779. The reversal of 56781117767 is 76771118765.

56781117767 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56781117767 - 2¹⁸ = 56780855623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56781117707) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36798398 + ... + 36799940.

It is an arithmetic number, because the mean of its divisors is an integer number (2060804592).

Almost surely, 2^56781117767 is an apocalyptic number.

56781117767 is a deficient number, since it is larger than the sum of its proper divisors (9164629177).

56781117767 is a wasteful number, since it uses less digits than its factorization.

56781117767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2519.

The product of its digits is 3457440, while the sum is 56.

The spelling of 56781117767 in words is "fifty-six billion, seven hundred eighty-one million, one hundred seventeen thousand, seven hundred sixty-seven".