17172631460987 has 4 divisors (see below), whose sum is σ = 18076454169480. Its totient is φ = 16268808752496.

The previous prime is 17172631460981. The next prime is 17172631461061. The reversal of 17172631460987 is 78906413627171.

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

It is a cyclic number.

It is not a de Polignac number, because 17172631460987 - 2¹² = 17172631456891 is a prime.

It is a super-4 number, since 4×17172631460987⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17172631460981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451911354218 + ... + 451911354255.

It is an arithmetic number, because the mean of its divisors is an integer number (4519113542370).

Almost surely, 2^{17172631460987} is an apocalyptic number.

17172631460987 is a deficient number, since it is larger than the sum of its proper divisors (903822708493).

17172631460987 is an equidigital number, since it uses as much as digits as its factorization.

17172631460987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903822708492.

The product of its (nonzero) digits is 21337344, while the sum is 62.

The spelling of 17172631460987 in words is "seventeen trillion, one hundred seventy-two billion, six hundred thirty-one million, four hundred sixty thousand, nine hundred eighty-seven".