77757554333868 has 12 divisors (see below), whose sum is σ = 181434293445720. Its totient is φ = 25919184777952.

The previous prime is 77757554333807. The next prime is 77757554333947. The reversal of 77757554333868 is 86833345575777.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 77757554333793 and 77757554333802.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3239898097233 + ... + 3239898097256.

It is an arithmetic number, because the mean of its divisors is an integer number (15119524453810).

Almost surely, 2^{77757554333868} is an apocalyptic number.

It is an amenable number.

77757554333868 is an abundant number, since it is smaller than the sum of its proper divisors (103676739111852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77757554333868 is a wasteful number, since it uses less digits than its factorization.

77757554333868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6479796194496 (or 6479796194494 counting only the distinct ones).

The product of its digits is 12446784000, while the sum is 78.

The spelling of 77757554333868 in words is "seventy-seven trillion, seven hundred fifty-seven billion, five hundred fifty-four million, three hundred thirty-three thousand, eight hundred sixty-eight".