78997880544 has 192 divisors, whose sum is σ = 232547874048. Its totient is φ = 23277363200.

The previous prime is 78997880539. The next prime is 78997880551. The reversal of 78997880544 is 44508879987.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6318139 + ... + 6330629.

It is an arithmetic number, because the mean of its divisors is an integer number (1211186844).

Almost surely, 2^78997880544 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 78997880544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116273937024).

78997880544 is an abundant number, since it is smaller than the sum of its proper divisors (153549993504).

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

78997880544 is a wasteful number, since it uses less digits than its factorization.

78997880544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12681 (or 12673 counting only the distinct ones).

The product of its (nonzero) digits is 162570240, while the sum is 69.

The spelling of 78997880544 in words is "seventy-eight billion, nine hundred ninety-seven million, eight hundred eighty thousand, five hundred forty-four".