17845364538 has 12 divisors (see below), whose sum is σ = 38664956538. Its totient is φ = 5948454840.

The previous prime is 17845364507. The next prime is 17845364539. The reversal of 17845364538 is 83546354871.

17845364538 is a `hidden beast` number, since 1 + 7 + 8 + 45 + 3 + 64 + 538 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16835841009 + 1009523529 = 129753^2 + 31773^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (17845364539) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 495704553 + ... + 495704588.

Almost surely, 2^17845364538 is an apocalyptic number.

17845364538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

17845364538 is an abundant number, since it is smaller than the sum of its proper divisors (20819592000).

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

17845364538 is a wasteful number, since it uses less digits than its factorization.

17845364538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991409149 (or 991409146 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 17845364538 in words is "seventeen billion, eight hundred forty-five million, three hundred sixty-four thousand, five hundred thirty-eight".