172440329399 has 32 divisors (see below), whose sum is σ = 189091869120. Its totient is φ = 156301516800.

The previous prime is 172440329393. The next prime is 172440329419. The reversal of 172440329399 is 993923044271.

It is not a de Polignac number, because 172440329399 - 2¹² = 172440325303 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172440329399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172440329393) 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, 145273484 + ... + 145274670.

It is an arithmetic number, because the mean of its divisors is an integer number (5909120910).

Almost surely, 2^172440329399 is an apocalyptic number.

172440329399 is a deficient number, since it is larger than the sum of its proper divisors (16651539721).

172440329399 is a wasteful number, since it uses less digits than its factorization.

172440329399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The spelling of 172440329399 in words is "one hundred seventy-two billion, four hundred forty million, three hundred twenty-nine thousand, three hundred ninety-nine".