172341216920 has 32 divisors (see below), whose sum is σ = 387850161600. Its totient is φ = 68921833728.

The previous prime is 172341216881. The next prime is 172341216959. The reversal of 172341216920 is 29612143271.

It is an interprime number because it is at equal distance from previous prime (172341216881) and next prime (172341216959).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266384 + ... + 644703.

It is an arithmetic number, because the mean of its divisors is an integer number (12120317550).

Almost surely, 2^172341216920 is an apocalyptic number.

172341216920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172341216920 is an abundant number, since it is smaller than the sum of its proper divisors (215508944680).

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

172341216920 is a wasteful number, since it uses less digits than its factorization.

172341216920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915827 (or 915823 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 172341216920 in words is "one hundred seventy-two billion, three hundred forty-one million, two hundred sixteen thousand, nine hundred twenty".