77043140870688 has 72 divisors (see below), whose sum is σ = 219094242143868. Its totient is φ = 25680717545472.

The previous prime is 77043140870627. The next prime is 77043140870693. The reversal of 77043140870688 is 88607804134077.

77043140870688 is a `hidden beast` number, since 7 + 7 + 0 + 431 + 40 + 87 + 0 + 6 + 88 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 77009259842064 + 33881028624 = 8775492^2 + 184068^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21311520 + ... + 24663072.

Almost surely, 2^{77043140870688} is an apocalyptic number.

It is an amenable number.

77043140870688 is an abundant number, since it is smaller than the sum of its proper divisors (142051101273180).

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

77043140870688 is a wasteful number, since it uses less digits than its factorization.

77043140870688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3431386 (or 3431375 counting only the distinct ones).

The product of its (nonzero) digits is 50577408, while the sum is 63.

The spelling of 77043140870688 in words is "seventy-seven trillion, forty-three billion, one hundred forty million, eight hundred seventy thousand, six hundred eighty-eight".