78461694018 has 48 divisors (see below), whose sum is σ = 171142377120. Its totient is φ = 25978387392.

The previous prime is 78461694011. The next prime is 78461694043. The reversal of 78461694018 is 81049616487.

78461694018 is a `hidden beast` number, since 7 + 8 + 4 + 616 + 9 + 4 + 0 + 18 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (78461694011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5799630 + ... + 5813142.

It is an arithmetic number, because the mean of its divisors is an integer number (3565466190).

Almost surely, 2^78461694018 is an apocalyptic number.

78461694018 is an abundant number, since it is smaller than the sum of its proper divisors (92680683102).

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

78461694018 is a wasteful number, since it uses less digits than its factorization.

78461694018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15663 (or 15660 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 78461694018 in words is "seventy-eight billion, four hundred sixty-one million, six hundred ninety-four thousand, eighteen".