173509120428 has 48 divisors (see below), whose sum is σ = 462950019840. Its totient is φ = 49546281024.

The previous prime is 173509120387. The next prime is 173509120429. The reversal of 173509120428 is 824021905371.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 173509120428.

It is not an unprimeable number, because it can be changed into a prime (173509120429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427026 + ... + 727577.

It is an arithmetic number, because the mean of its divisors is an integer number (9644792080).

Almost surely, 2^173509120428 is an apocalyptic number.

It is an amenable number.

173509120428 is an abundant number, since it is smaller than the sum of its proper divisors (289440899412).

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

173509120428 is a wasteful number, since it uses less digits than its factorization.

173509120428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156406 (or 1156404 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 173509120428 in words is "one hundred seventy-three billion, five hundred nine million, one hundred twenty thousand, four hundred twenty-eight".