78646479180 has 48 divisors (see below), whose sum is σ = 220345762560. Its totient is φ = 20959478208.

The previous prime is 78646479179. The next prime is 78646479181. The reversal of 78646479180 is 8197464687.

It is an interprime number because it is at equal distance from previous prime (78646479179) and next prime (78646479181).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (78646479181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305200 + ... + 500439.

It is an arithmetic number, because the mean of its divisors is an integer number (4590536720).

Almost surely, 2^78646479180 is an apocalyptic number.

It is an amenable number.

78646479180 is an abundant number, since it is smaller than the sum of its proper divisors (141699283380).

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

78646479180 is a wasteful number, since it uses less digits than its factorization.

78646479180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807278 (or 807276 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 60.

The spelling of 78646479180 in words is "seventy-eight billion, six hundred forty-six million, four hundred seventy-nine thousand, one hundred eighty".