18878643788046 has 48 divisors (see below), whose sum is σ = 44310430756944. Its totient is φ = 5346164603136.

The previous prime is 18878643788029. The next prime is 18878643788087. The reversal of 18878643788046 is 64088734687881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284095425 + ... + 284161868.

It is an arithmetic number, because the mean of its divisors is an integer number (923133974103).

Almost surely, 2^{18878643788046} is an apocalyptic number.

18878643788046 is an abundant number, since it is smaller than the sum of its proper divisors (25431786968898).

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

18878643788046 is a wasteful number, since it uses less digits than its factorization.

18878643788046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568257425 (or 568257418 counting only the distinct ones).

The product of its (nonzero) digits is 2774532096, while the sum is 78.

The spelling of 18878643788046 in words is "eighteen trillion, eight hundred seventy-eight billion, six hundred forty-three million, seven hundred eighty-eight thousand, forty-six".