77545184980 has 72 divisors (see below), whose sum is σ = 170400706560. Its totient is φ = 29636942400.

The previous prime is 77545184929. The next prime is 77545184993. The reversal of 77545184980 is 8948154577.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1492845 + ... + 1543915.

It is an arithmetic number, because the mean of its divisors is an integer number (2366676480).

Almost surely, 2^77545184980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77545184980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85200353280).

77545184980 is an abundant number, since it is smaller than the sum of its proper divisors (92855521580).

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

77545184980 is a wasteful number, since it uses less digits than its factorization.

77545184980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51221 (or 51188 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 58.

The spelling of 77545184980 in words is "seventy-seven billion, five hundred forty-five million, one hundred eighty-four thousand, nine hundred eighty".