78170448516 has 24 divisors (see below), whose sum is σ = 182772260160. Its totient is φ = 26003309472.

The previous prime is 78170448491. The next prime is 78170448541. The reversal of 78170448516 is 61584407187.

It is an interprime number because it is at equal distance from previous prime (78170448491) and next prime (78170448541).

It is a super-2 number, since 2×78170448516² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6682251 + ... + 6693938.

It is an arithmetic number, because the mean of its divisors is an integer number (7615510840).

Almost surely, 2^78170448516 is an apocalyptic number.

It is an amenable number.

78170448516 is an abundant number, since it is smaller than the sum of its proper divisors (104601811644).

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

78170448516 is a wasteful number, since it uses less digits than its factorization.

78170448516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13376683 (or 13376681 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 51.

The spelling of 78170448516 in words is "seventy-eight billion, one hundred seventy million, four hundred forty-eight thousand, five hundred sixteen".