173420340912 has 480 divisors, whose sum is σ = 622868133888. Its totient is φ = 43823130624.

The previous prime is 173420340901. The next prime is 173420340913. The reversal of 173420340912 is 219043024371.

It is a happy number.

173420340912 is a `hidden beast` number, since 1 + 7 + 34 + 203 + 409 + 12 = 666.

It is a super-2 number, since 2×173420340912² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (173420340913) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 29861113 + ... + 29866919.

Almost surely, 2^173420340912 is an apocalyptic number.

173420340912 is a gapful number since it is divisible by the number (12) 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 173420340912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311434066944).

173420340912 is an abundant number, since it is smaller than the sum of its proper divisors (449447792976).

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

173420340912 is a wasteful number, since it uses less digits than its factorization.

173420340912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5937 (or 5928 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 173420340912 in words is "one hundred seventy-three billion, four hundred twenty million, three hundred forty thousand, nine hundred twelve".