17145727215 has 12 divisors (see below), whose sum is σ = 27433974984. Its totient is φ = 9144117376.

The previous prime is 17145727201. The next prime is 17145727231. The reversal of 17145727215 is 51272754171.

It is not a de Polignac number, because 17145727215 - 2⁷ = 17145727087 is a prime.

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, 490231 + ... + 524039.

It is an arithmetic number, because the mean of its divisors is an integer number (2286164582).

Almost surely, 2^17145727215 is an apocalyptic number.

17145727215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

17145727215 is a deficient number, since it is larger than the sum of its proper divisors (10288247769).

17145727215 is an frugal number, since it uses more digits than its factorization.

17145727215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67626 (or 33817 counting only the distinct ones).

The product of its digits is 137200, while the sum is 42.

The spelling of 17145727215 in words is "seventeen billion, one hundred forty-five million, seven hundred twenty-seven thousand, two hundred fifteen".