18450129084455 has 16 divisors (see below), whose sum is σ = 22211817810624. Its totient is φ = 14712330017280.

The previous prime is 18450129084451. The next prime is 18450129084487. The reversal of 18450129084455 is 55448092105481.

It is a happy number.

It is not a de Polignac number, because 18450129084455 - 2² = 18450129084451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18450129084455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18450129084451) 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, 96963389 + ... + 97153481.

It is an arithmetic number, because the mean of its divisors is an integer number (1388238613164).

Almost surely, 2^{18450129084455} is an apocalyptic number.

18450129084455 is a deficient number, since it is larger than the sum of its proper divisors (3761688726169).

18450129084455 is a wasteful number, since it uses less digits than its factorization.

18450129084455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252826.

The product of its (nonzero) digits is 9216000, while the sum is 56.

The spelling of 18450129084455 in words is "eighteen trillion, four hundred fifty billion, one hundred twenty-nine million, eighty-four thousand, four hundred fifty-five".