56777765 has 16 divisors (see below), whose sum is σ = 75591360. Its totient is φ = 40590720.

The previous prime is 56777761. The next prime is 56777801.

56777765 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56777765 - 2² = 56777761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56777761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5504 + ... + 11993.

It is an arithmetic number, because the mean of its divisors is an integer number (4724460).

Almost surely, 2^56777765 is an apocalyptic number.

56777765 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56777765 is a deficient number, since it is larger than the sum of its proper divisors (18813595).

56777765 is a wasteful number, since it uses less digits than its factorization.

56777765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17572.

The product of its digits is 2160900, while the sum is 50.

The square root of 56777765 is about 7535.1021890881. The cubic root of 56777765 is about 384.3493028406.

The spelling of 56777765 in words is "fifty-six million, seven hundred seventy-seven thousand, seven hundred sixty-five".