78842252080 has 40 divisors (see below), whose sum is σ = 183360232944. Its totient is φ = 31527955200.

The previous prime is 78842251997. The next prime is 78842252081. The reversal of 78842252080 is 8025224887.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×78842252080² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78842252080.

It is not an unprimeable number, because it can be changed into a prime (78842252081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147690 + ... + 423670.

Almost surely, 2^78842252080 is an apocalyptic number.

It is an amenable number.

78842252080 is an abundant number, since it is smaller than the sum of its proper divisors (104517980864).

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

78842252080 is a wasteful number, since it uses less digits than its factorization.

78842252080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279565 (or 279559 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 46.

The spelling of 78842252080 in words is "seventy-eight billion, eight hundred forty-two million, two hundred fifty-two thousand, eighty".