245172173145500 has 48 divisors (see below), whose sum is σ = 535679228448000. Its totient is φ = 98027989716800.

The previous prime is 245172173145499. The next prime is 245172173145509. The reversal of 245172173145500 is 5541371271542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245172173145509) 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, 100998155 + ... + 103397154.

It is an arithmetic number, because the mean of its divisors is an integer number (11159983926000).

Almost surely, 2^{245172173145500} is an apocalyptic number.

245172173145500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245172173145500 is an abundant number, since it is smaller than the sum of its proper divisors (290507055302500).

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

245172173145500 is a wasteful number, since it uses less digits than its factorization.

245172173145500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204397727 (or 204397715 counting only the distinct ones).

The product of its (nonzero) digits is 1176000, while the sum is 47.

The spelling of 245172173145500 in words is "two hundred forty-five trillion, one hundred seventy-two billion, one hundred seventy-three million, one hundred forty-five thousand, five hundred".