77788857641112 has 24 divisors (see below), whose sum is σ = 210678156111540. Its totient is φ = 25929619213680.

The previous prime is 77788857641081. The next prime is 77788857641167. The reversal of 77788857641112 is 21114675888777.

77788857641112 is a `hidden beast` number, since 7 + 7 + 7 + 8 + 8 + 8 + 576 + 41 + 1 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×77788857641112² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72), and also a Moran number because the ratio is a prime number: 1080400800571 = 77788857641112 / (7 + 7 + 7 + 8 + 8 + 8 + 5 + 7 + 6 + 4 + 1 + 1 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 540200400214 + ... + 540200400357.

Almost surely, 2^{77788857641112} is an apocalyptic number.

77788857641112 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

77788857641112 is an abundant number, since it is smaller than the sum of its proper divisors (132889298470428).

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

77788857641112 is a wasteful number, since it uses less digits than its factorization.

77788857641112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080400800583 (or 1080400800576 counting only the distinct ones).

The product of its digits is 295034880, while the sum is 72.

The spelling of 77788857641112 in words is "seventy-seven trillion, seven hundred eighty-eight billion, eight hundred fifty-seven million, six hundred forty-one thousand, one hundred twelve".