18442260799578 has 48 divisors (see below), whose sum is σ = 49818055150656. Its totient is φ = 4790197609920.

The previous prime is 18442260799549. The next prime is 18442260799583. The reversal of 18442260799578 is 87599706224481.

It is a happy number.

18442260799578 is a `hidden beast` number, since 1 + 8 + 4 + 4 + 2 + 2 + 607 + 9 + 9 + 5 + 7 + 8 = 666.

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, 6653050851 + ... + 6653053622.

It is an arithmetic number, because the mean of its divisors is an integer number (1037876148972).

Almost surely, 2^{18442260799578} is an apocalyptic number.

18442260799578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18442260799578 is an abundant number, since it is smaller than the sum of its proper divisors (31375794351078).

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

18442260799578 is a wasteful number, since it uses less digits than its factorization.

18442260799578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13306104499 (or 13306104496 counting only the distinct ones).

The product of its (nonzero) digits is 487710720, while the sum is 72.

The spelling of 18442260799578 in words is "eighteen trillion, four hundred forty-two billion, two hundred sixty million, seven hundred ninety-nine thousand, five hundred seventy-eight".