16518226455 has 16 divisors (see below), whose sum is σ = 29365736160. Its totient is φ = 8809720704.

The previous prime is 16518226453. The next prime is 16518226471. The reversal of 16518226455 is 55462281561.

16518226455 is a `hidden beast` number, since 1 + 6 + 518 + 22 + 64 + 55 = 666.

It is not a de Polignac number, because 16518226455 - 2¹ = 16518226453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 16518226455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16518226453) 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, 61178482 + ... + 61178751.

It is an arithmetic number, because the mean of its divisors is an integer number (1835358510).

Almost surely, 2^16518226455 is an apocalyptic number.

16518226455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16518226455 is a deficient number, since it is larger than the sum of its proper divisors (12847509705).

16518226455 is a wasteful number, since it uses less digits than its factorization.

16518226455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122357247 (or 122357241 counting only the distinct ones).

The product of its digits is 576000, while the sum is 45.

The spelling of 16518226455 in words is "sixteen billion, five hundred eighteen million, two hundred twenty-six thousand, four hundred fifty-five".