77786564645836 has 12 divisors (see below), whose sum is σ = 136312199578912. Its totient is φ = 38840221909008.

The previous prime is 77786564645833. The next prime is 77786564645869. The reversal of 77786564645836 is 63854646568777.

It is a super-2 number, since 2×77786564645836² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77786564645836.

It is not an unprimeable number, because it can be changed into a prime (77786564645831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13265100180 + ... + 13265106043.

Almost surely, 2^{77786564645836} is an apocalyptic number.

It is an amenable number.

77786564645836 is a deficient number, since it is larger than the sum of its proper divisors (58525634933076).

77786564645836 is a wasteful number, since it uses less digits than its factorization.

77786564645836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26530206960 (or 26530206958 counting only the distinct ones).

The product of its digits is 34139750400, while the sum is 82.

The spelling of 77786564645836 in words is "seventy-seven trillion, seven hundred eighty-six billion, five hundred sixty-four million, six hundred forty-five thousand, eight hundred thirty-six".