17856541045 has 12 divisors (see below), whose sum is σ = 24926273964. Its totient is φ = 12244485120.

The previous prime is 17856541033. The next prime is 17856541081. The reversal of 17856541045 is 54014565871.

It can be written as a sum of positive squares in 2 ways, for example, as 10411957521 + 7444583524 = 102039^2 + 86282^2 .

It is not a de Polignac number, because 17856541045 - 2¹³ = 17856532853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17856540986 and 17856541004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36441676 + ... + 36442165.

It is an arithmetic number, because the mean of its divisors is an integer number (2077189497).

Almost surely, 2^17856541045 is an apocalyptic number.

It is an amenable number.

17856541045 is a deficient number, since it is larger than the sum of its proper divisors (7069732919).

17856541045 is an equidigital number, since it uses as much as digits as its factorization.

17856541045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72883860 (or 72883853 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 46.

The spelling of 17856541045 in words is "seventeen billion, eight hundred fifty-six million, five hundred forty-one thousand, forty-five".