17807841145 has 4 divisors (see below), whose sum is σ = 21369409380. Its totient is φ = 14246272912.

The previous prime is 17807841113. The next prime is 17807841179. The reversal of 17807841145 is 54114870871.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11323726569 + 6484114576 = 106413^2 + 80524^2 .

It is a cyclic number.

It is not a de Polignac number, because 17807841145 - 2⁵ = 17807841113 is a prime.

It is a super-2 number, since 2×17807841145² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 17807841095 and 17807841104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1780784110 + ... + 1780784119.

It is an arithmetic number, because the mean of its divisors is an integer number (5342352345).

Almost surely, 2^17807841145 is an apocalyptic number.

It is an amenable number.

17807841145 is a deficient number, since it is larger than the sum of its proper divisors (3561568235).

17807841145 is an equidigital number, since it uses as much as digits as its factorization.

17807841145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561568234.

The product of its (nonzero) digits is 250880, while the sum is 46.

The spelling of 17807841145 in words is "seventeen billion, eight hundred seven million, eight hundred forty-one thousand, one hundred forty-five".