77851482981942 has 32 divisors (see below), whose sum is σ = 158421159406080. Its totient is φ = 25500575711520.

The previous prime is 77851482981913. The next prime is 77851482981953. The reversal of 77851482981942 is 24918928415877.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389102913 + ... + 389302940.

It is an arithmetic number, because the mean of its divisors is an integer number (4950661231440).

Almost surely, 2^{77851482981942} is an apocalyptic number.

77851482981942 is an abundant number, since it is smaller than the sum of its proper divisors (80569676424138).

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

77851482981942 is a wasteful number, since it uses less digits than its factorization.

77851482981942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778406148.

The product of its digits is 650280960, while the sum is 75.

The spelling of 77851482981942 in words is "seventy-seven trillion, eight hundred fifty-one billion, four hundred eighty-two million, nine hundred eighty-one thousand, nine hundred forty-two".