77120340120640 has 28 divisors (see below), whose sum is σ = 183642809913036. Its totient is φ = 30848136048128.

The previous prime is 77120340120619. The next prime is 77120340120731. The reversal of 77120340120640 is 4602104302177.

It can be written as a sum of positive squares in 2 ways, for example, as 53264774185984 + 23855565934656 = 7298272^2 + 4884216^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77120340120640.

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, 120500531119 + ... + 120500531758.

Almost surely, 2^{77120340120640} is an apocalyptic number.

It is an amenable number.

77120340120640 is an abundant number, since it is smaller than the sum of its proper divisors (106522469792396).

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

77120340120640 is a wasteful number, since it uses less digits than its factorization.

77120340120640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241001062894 (or 241001062884 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The spelling of 77120340120640 in words is "seventy-seven trillion, one hundred twenty billion, three hundred forty million, one hundred twenty thousand, six hundred forty".