172880335349 has 4 divisors (see below), whose sum is σ = 172897184064. Its totient is φ = 172863486636.

The previous prime is 172880335319. The next prime is 172880335357. The reversal of 172880335349 is 943533088271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172880335349 is a prime.

It is a super-2 number, since 2×172880335349² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 172880335349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172880335319) 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, 8408957 + ... + 8429490.

It is an arithmetic number, because the mean of its divisors is an integer number (43224296016).

Almost surely, 2^172880335349 is an apocalyptic number.

It is an amenable number.

172880335349 is a deficient number, since it is larger than the sum of its proper divisors (16848715).

172880335349 is a wasteful number, since it uses less digits than its factorization.

172880335349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16848714.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 172880335349 in words is "one hundred seventy-two billion, eight hundred eighty million, three hundred thirty-five thousand, three hundred forty-nine".