172290366648 has 24 divisors (see below), whose sum is σ = 466619743200. Its totient is φ = 57430122192.

The previous prime is 172290366637. The next prime is 172290366649. The reversal of 172290366648 is 846663092271.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 172290366594 and 172290366603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172290366649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1196460808 + ... + 1196460951.

It is an arithmetic number, because the mean of its divisors is an integer number (19442489300).

Almost surely, 2^172290366648 is an apocalyptic number.

172290366648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

172290366648 is an abundant number, since it is smaller than the sum of its proper divisors (294329376552).

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

172290366648 is a wasteful number, since it uses less digits than its factorization.

172290366648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392921771 (or 2392921764 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 172290366648 in words is "one hundred seventy-two billion, two hundred ninety million, three hundred sixty-six thousand, six hundred forty-eight".