77888901969128 has 32 divisors (see below), whose sum is σ = 159029064828000. Its totient is φ = 35622510517440.

The previous prime is 77888901969061. The next prime is 77888901969133. The reversal of 77888901969128 is 82196910988877.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8834943638 + ... + 8834952453.

It is an arithmetic number, because the mean of its divisors is an integer number (4969658275875).

Almost surely, 2^{77888901969128} is an apocalyptic number.

It is an amenable number.

77888901969128 is an abundant number, since it is smaller than the sum of its proper divisors (81140162858872).

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

77888901969128 is a wasteful number, since it uses less digits than its factorization.

77888901969128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17669896145 (or 17669896141 counting only the distinct ones).

The product of its (nonzero) digits is 1755758592, while the sum is 83.

The spelling of 77888901969128 in words is "seventy-seven trillion, eight hundred eighty-eight billion, nine hundred one million, nine hundred sixty-nine thousand, one hundred twenty-eight".