17845372545 has 128 divisors (see below), whose sum is σ = 38436249600. Its totient is φ = 6827950080.

The previous prime is 17845372541. The next prime is 17845372547. The reversal of 17845372545 is 54527354871.

It is not a de Polignac number, because 17845372545 - 2² = 17845372541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17845372541) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6740412 + ... + 6743058.

It is an arithmetic number, because the mean of its divisors is an integer number (300283200).

Almost surely, 2^17845372545 is an apocalyptic number.

17845372545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17845372545 is an abundant number, since it is smaller than the sum of its proper divisors (20590877055).

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

17845372545 is a wasteful number, since it uses less digits than its factorization.

17845372545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3135.

The product of its digits is 4704000, while the sum is 51.

The spelling of 17845372545 in words is "seventeen billion, eight hundred forty-five million, three hundred seventy-two thousand, five hundred forty-five".