78628850064816 has 40 divisors (see below), whose sum is σ = 211956030612480. Its totient is φ = 25070068136256.

The previous prime is 78628850064781. The next prime is 78628850064833. The reversal of 78628850064816 is 61846005882687.

It is a super-2 number, since 2×78628850064816² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35610891136 + ... + 35610893343.

It is an arithmetic number, because the mean of its divisors is an integer number (5298900765312).

Almost surely, 2^{78628850064816} is an apocalyptic number.

It is an amenable number.

78628850064816 is an abundant number, since it is smaller than the sum of its proper divisors (133327180547664).

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

78628850064816 is a wasteful number, since it uses less digits than its factorization.

78628850064816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71221784513 (or 71221784507 counting only the distinct ones).

The product of its (nonzero) digits is 247726080, while the sum is 69.

The spelling of 78628850064816 in words is "seventy-eight trillion, six hundred twenty-eight billion, eight hundred fifty million, sixty-four thousand, eight hundred sixteen".