172673233920 has 1584 divisors, whose sum is σ = 723028959744. Its totient is φ = 39414988800.

The previous prime is 172673233903. The next prime is 172673233937. The reversal of 172673233920 is 29332376271.

172673233920 is a `hidden beast` number, since 1 + 7 + 267 + 32 + 339 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (172673233903) and next prime (172673233937).

It is a tau number, because it is divible by the number of its divisors (1584).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4666844142 + ... + 4666844178.

Almost surely, 2^172673233920 is an apocalyptic number.

172673233920 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 172673233920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361514479872).

172673233920 is an abundant number, since it is smaller than the sum of its proper divisors (550355725824).

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

172673233920 is a wasteful number, since it uses less digits than its factorization.

172673233920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 45.

The spelling of 172673233920 in words is "one hundred seventy-two billion, six hundred seventy-three million, two hundred thirty-three thousand, nine hundred twenty".