65456772057 has 40 divisors (see below), whose sum is σ = 100784388672. Its totient is φ = 42317704800.

The previous prime is 65456772037. The next prime is 65456772067. The reversal of 65456772057 is 75027765456.

65456772057 is a `hidden beast` number, since 6 + 5 + 4 + 567 + 7 + 20 + 57 = 666.

It is not a de Polignac number, because 65456772057 - 2¹¹ = 65456770009 is a prime.

It is a super-2 number, since 2×65456772057² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65456771994 and 65456772012.

It is not an unprimeable number, because it can be changed into a prime (65456772037) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 257518 + ... + 444104.

Almost surely, 2^65456772057 is an apocalyptic number.

It is an amenable number.

65456772057 is a deficient number, since it is larger than the sum of its proper divisors (35327616615).

65456772057 is a wasteful number, since it uses less digits than its factorization.

65456772057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186731 (or 186722 counting only the distinct ones).

The product of its (nonzero) digits is 12348000, while the sum is 54.

The spelling of 65456772057 in words is "sixty-five billion, four hundred fifty-six million, seven hundred seventy-two thousand, fifty-seven".