172579798489 has 32 divisors (see below), whose sum is σ = 202405464576. Its totient is φ = 144089487360.

The previous prime is 172579798487. The next prime is 172579798493. The reversal of 172579798489 is 984897975271.

It is not a de Polignac number, because 172579798489 - 2¹ = 172579798487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172579798487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85561609 + ... + 85563625.

It is an arithmetic number, because the mean of its divisors is an integer number (6325170768).

Almost surely, 2^172579798489 is an apocalyptic number.

It is an amenable number.

172579798489 is a deficient number, since it is larger than the sum of its proper divisors (29825666087).

172579798489 is a wasteful number, since it uses less digits than its factorization.

172579798489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3625.

The product of its digits is 640120320, while the sum is 76.

The spelling of 172579798489 in words is "one hundred seventy-two billion, five hundred seventy-nine million, seven hundred ninety-eight thousand, four hundred eighty-nine".