78897740144 has 80 divisors (see below), whose sum is σ = 161914636800. Its totient is φ = 37168876800.

The previous prime is 78897740113. The next prime is 78897740191. The reversal of 78897740144 is 44104779887.

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, 7391099 + ... + 7401765.

It is an arithmetic number, because the mean of its divisors is an integer number (2023932960).

Almost surely, 2^78897740144 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 78897740144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80957318400).

78897740144 is an abundant number, since it is smaller than the sum of its proper divisors (83016896656).

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

78897740144 is a wasteful number, since it uses less digits than its factorization.

78897740144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10998 (or 10992 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 59.

The spelling of 78897740144 in words is "seventy-eight billion, eight hundred ninety-seven million, seven hundred forty thousand, one hundred forty-four".