77555818022112 has 72 divisors (see below), whose sum is σ = 220551602819184. Its totient is φ = 25851676153344.

The previous prime is 77555818022107. The next prime is 77555818022113. The reversal of 77555818022112 is 21122081855577.

77555818022112 is a `hidden beast` number, since 7 + 7 + 5 + 558 + 1 + 80 + 2 + 2 + 1 + 1 + 2 = 666.

77555818022112 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77555818022113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28062868 + ... + 30702380.

It is an arithmetic number, because the mean of its divisors is an integer number (3063216705822).

Almost surely, 2^{77555818022112} is an apocalyptic number.

77555818022112 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

77555818022112 is an abundant number, since it is smaller than the sum of its proper divisors (142995784797072).

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

77555818022112 is a wasteful number, since it uses less digits than its factorization.

77555818022112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741552 (or 2741541 counting only the distinct ones).

The product of its (nonzero) digits is 3136000, while the sum is 54.

Adding to 77555818022112 its reverse (21122081855577), we get a palindrome (98677899877689).

The spelling of 77555818022112 in words is "seventy-seven trillion, five hundred fifty-five billion, eight hundred eighteen million, twenty-two thousand, one hundred twelve".