78899293816 has 64 divisors (see below), whose sum is σ = 175597632000. Its totient is φ = 32517744000.

The previous prime is 78899293777. The next prime is 78899293843. The reversal of 78899293816 is 61839299887.

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, 310845 + ... + 504403.

It is an arithmetic number, because the mean of its divisors is an integer number (2743713000).

Almost surely, 2^78899293816 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 78899293816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87798816000).

78899293816 is an abundant number, since it is smaller than the sum of its proper divisors (96698338184).

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

78899293816 is a wasteful number, since it uses less digits than its factorization.

78899293816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193852 (or 193848 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 70.

The spelling of 78899293816 in words is "seventy-eight billion, eight hundred ninety-nine million, two hundred ninety-three thousand, eight hundred sixteen".