17671497985 has 16 divisors (see below), whose sum is σ = 21574356480. Its totient is φ = 13891696000.

The previous prime is 17671497983. The next prime is 17671497989. The reversal of 17671497985 is 58979417671.

It is not a de Polignac number, because 17671497985 - 2¹ = 17671497983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17671497983) 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, 765360 + ... + 788110.

It is an arithmetic number, because the mean of its divisors is an integer number (1348397280).

Almost surely, 2^17671497985 is an apocalyptic number.

It is an amenable number.

17671497985 is a deficient number, since it is larger than the sum of its proper divisors (3902858495).

17671497985 is a wasteful number, since it uses less digits than its factorization.

17671497985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25448.

The product of its digits is 26671680, while the sum is 64.

The spelling of 17671497985 in words is "seventeen billion, six hundred seventy-one million, four hundred ninety-seven thousand, nine hundred eighty-five".