64656727756 has 6 divisors (see below), whose sum is σ = 113149273580. Its totient is φ = 32328363876.

The previous prime is 64656727753. The next prime is 64656727757. The reversal of 64656727756 is 65772765646.

It is a super-2 number, since 2×64656727756² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64656727694 and 64656727703.

It is not an unprimeable number, because it can be changed into a prime (64656727753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8082090966 + ... + 8082090973.

Almost surely, 2^64656727756 is an apocalyptic number.

It is an amenable number.

64656727756 is a deficient number, since it is larger than the sum of its proper divisors (48492545824).

64656727756 is a wasteful number, since it uses less digits than its factorization.

64656727756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16164181943 (or 16164181941 counting only the distinct ones).

The product of its digits is 88905600, while the sum is 61.

The spelling of 64656727756 in words is "sixty-four billion, six hundred fifty-six million, seven hundred twenty-seven thousand, seven hundred fifty-six".