78837867216 has 320 divisors, whose sum is σ = 237973340160. Its totient is φ = 24964692480.

The previous prime is 78837867161. The next prime is 78837867271. The reversal of 78837867216 is 61276873887.

It is an interprime number because it is at equal distance from previous prime (78837867161) and next prime (78837867271).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 144127455 + ... + 144128001.

It is an arithmetic number, because the mean of its divisors is an integer number (743666688).

Almost surely, 2^78837867216 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 78837867216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118986670080).

78837867216 is an abundant number, since it is smaller than the sum of its proper divisors (159135472944).

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

78837867216 is a wasteful number, since it uses less digits than its factorization.

78837867216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799 (or 787 counting only the distinct ones).

The product of its digits is 37933056, while the sum is 63.

The spelling of 78837867216 in words is "seventy-eight billion, eight hundred thirty-seven million, eight hundred sixty-seven thousand, two hundred sixteen".