172668552090 has 32 divisors (see below), whose sum is σ = 414908113536. Its totient is φ = 45988992960.

The previous prime is 172668552071. The next prime is 172668552097. The reversal of 172668552090 is 90255866271.

It is not an unprimeable number, because it can be changed into a prime (172668552097) 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 15 ways as a sum of consecutive naturals, for example, 3472041 + ... + 3521420.

It is an arithmetic number, because the mean of its divisors is an integer number (12965878548).

Almost surely, 2^172668552090 is an apocalyptic number.

172668552090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172668552090 is an abundant number, since it is smaller than the sum of its proper divisors (242239561446).

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

172668552090 is a wasteful number, since it uses less digits than its factorization.

172668552090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6994294.

The product of its (nonzero) digits is 1814400, while the sum is 51.

The spelling of 172668552090 in words is "one hundred seventy-two billion, six hundred sixty-eight million, five hundred fifty-two thousand, ninety".