77989660594380 has 60 divisors (see below), whose sum is σ = 244656453795600. Its totient is φ = 20797242824736.

The previous prime is 77989660594337. The next prime is 77989660594403. The reversal of 77989660594380 is 8349506698977.

77989660594380 is a `hidden beast` number, since 7 + 7 + 9 + 8 + 96 + 60 + 5 + 94 + 380 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 77989660594380.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24070881280 + ... + 24070884519.

It is an arithmetic number, because the mean of its divisors is an integer number (4077607563260).

Almost surely, 2^{77989660594380} is an apocalyptic number.

It is an amenable number.

77989660594380 is an abundant number, since it is smaller than the sum of its proper divisors (166666793201220).

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

77989660594380 is a wasteful number, since it uses less digits than its factorization.

77989660594380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48141765820 (or 48141765809 counting only the distinct ones).

The product of its (nonzero) digits is 4938071040, while the sum is 81.

The spelling of 77989660594380 in words is "seventy-seven trillion, nine hundred eighty-nine billion, six hundred sixty million, five hundred ninety-four thousand, three hundred eighty".