172615668 has 12 divisors (see below), whose sum is σ = 402769920. Its totient is φ = 57538552.

The previous prime is 172615661. The next prime is 172615669. The reversal of 172615668 is 866516271.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172615661) 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, 7192308 + ... + 7192331.

It is an arithmetic number, because the mean of its divisors is an integer number (33564160).

Almost surely, 2^172615668 is an apocalyptic number.

It is an amenable number.

172615668 is an abundant number, since it is smaller than the sum of its proper divisors (230154252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172615668 is a wasteful number, since it uses less digits than its factorization.

172615668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14384646 (or 14384644 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 172615668 is about 13138.3282041514. The cubic root of 172615668 is about 556.7925355511.

The spelling of 172615668 in words is "one hundred seventy-two million, six hundred fifteen thousand, six hundred sixty-eight".