78240357120 has 72 divisors (see below), whose sum is σ = 249880152816. Its totient is φ = 20864094208.

The previous prime is 78240357071. The next prime is 78240357229. The reversal of 78240357120 is 2175304287.

It is a super-2 number, since 2×78240357120² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10183707 + ... + 10191386.

It is an arithmetic number, because the mean of its divisors is an integer number (3470557678).

Almost surely, 2^78240357120 is an apocalyptic number.

It is an amenable number.

78240357120 is an abundant number, since it is smaller than the sum of its proper divisors (171639795696).

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

78240357120 is a wasteful number, since it uses less digits than its factorization.

78240357120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20375117 (or 20375103 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The spelling of 78240357120 in words is "seventy-eight billion, two hundred forty million, three hundred fifty-seven thousand, one hundred twenty".