172489099387 has 24 divisors (see below), whose sum is σ = 206173846368. Its totient is φ = 143595429120.

The previous prime is 172489099381. The next prime is 172489099399. The reversal of 172489099387 is 783990984271.

It is a de Polignac number, because none of the positive numbers 2^k-172489099387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172489099381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1057063 + ... + 1209280.

It is an arithmetic number, because the mean of its divisors is an integer number (8590576932).

Almost surely, 2^172489099387 is an apocalyptic number.

172489099387 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

172489099387 is a deficient number, since it is larger than the sum of its proper divisors (33684746981).

172489099387 is a wasteful number, since it uses less digits than its factorization.

172489099387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2266419 (or 2266408 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 67.

The spelling of 172489099387 in words is "one hundred seventy-two billion, four hundred eighty-nine million, ninety-nine thousand, three hundred eighty-seven".