56778487765 has 64 divisors (see below), whose sum is σ = 75211960320. Its totient is φ = 40974336000.

The previous prime is 56778487763. The next prime is 56778487837.

56778487765 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56778487765 - 2¹ = 56778487763 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56778487694 and 56778487703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56778487763) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 74609985 + ... + 74610745.

It is an arithmetic number, because the mean of its divisors is an integer number (1175186880).

Almost surely, 2^56778487765 is an apocalyptic number.

It is an amenable number.

56778487765 is a deficient number, since it is larger than the sum of its proper divisors (18433472555).

56778487765 is a wasteful number, since it uses less digits than its factorization.

56778487765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174.

The product of its digits is 553190400, while the sum is 70.

The spelling of 56778487765 in words is "fifty-six billion, seven hundred seventy-eight million, four hundred eighty-seven thousand, seven hundred sixty-five".