18245678078016 has 63 divisors (see below), whose sum is σ = 52298235697071. Its totient is φ = 6081858520704.

The previous prime is 18245678077999. The next prime is 18245678078027. The reversal of 18245678078016 is 61087087654281.

It is a happy number.

The square root of 18245678078016 is 4271496.

It is a perfect power (a square), and thus also a powerful number.

18245678078016 is a `hidden beast` number, since 18 + 2 + 456 + 7 + 80 + 7 + 80 + 16 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 102426915 + ... + 102604893.

Almost surely, 2^{18245678078016} is an apocalyptic number.

18245678078016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18245678078016 is the 4271496-th square number.

It is an amenable number.

18245678078016 is an abundant number, since it is smaller than the sum of its proper divisors (34052557619055).

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

18245678078016 is an frugal number, since it uses more digits than its factorization.

18245678078016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355976 (or 177984 counting only the distinct ones).

The product of its (nonzero) digits is 36126720, while the sum is 63.

The spelling of 18245678078016 in words is "eighteen trillion, two hundred forty-five billion, six hundred seventy-eight million, seventy-eight thousand, sixteen".