77708207775744 has 3360 divisors, whose sum is σ = 312722125294656. Its totient is φ = 18712803409920.

The previous prime is 77708207775719. The next prime is 77708207775773. The reversal of 77708207775744 is 44757770280777.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 1064495996892 + ... + 1064495996964.

Almost surely, 2^{77708207775744} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77708207775744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156361062647328).

77708207775744 is an abundant number, since it is smaller than the sum of its proper divisors (235013917518912).

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

77708207775744 is a wasteful number, since it uses less digits than its factorization.

77708207775744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 1054135040, while the sum is 72.

The spelling of 77708207775744 in words is "seventy-seven trillion, seven hundred eight billion, two hundred seven million, seven hundred seventy-five thousand, seven hundred forty-four".