172905794500 has 96 divisors (see below), whose sum is σ = 392613451776. Its totient is φ = 66467808000.

The previous prime is 172905794443. The next prime is 172905794539. The reversal of 172905794500 is 5497509271.

It is a happy number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1310557 + ... + 1436443.

It is an arithmetic number, because the mean of its divisors is an integer number (4089723456).

Almost surely, 2^172905794500 is an apocalyptic number.

172905794500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172905794500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196306725888).

172905794500 is an abundant number, since it is smaller than the sum of its proper divisors (219707657276).

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

172905794500 is a wasteful number, since it uses less digits than its factorization.

172905794500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126014 (or 126002 counting only the distinct ones).

The product of its (nonzero) digits is 793800, while the sum is 49.

The spelling of 172905794500 in words is "one hundred seventy-two billion, nine hundred five million, seven hundred ninety-four thousand, five hundred".