172073257317623 has 4 divisors (see below), whose sum is σ = 172073630818848. Its totient is φ = 172072883816400.

The previous prime is 172073257317539. The next prime is 172073257317671. The reversal of 172073257317623 is 326713752370271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172073257317623 - 2³⁴ = 172056077448439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172073257617623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186058703 + ... + 186981248.

It is an arithmetic number, because the mean of its divisors is an integer number (43018407704712).

Almost surely, 2^{172073257317623} is an apocalyptic number.

172073257317623 is a deficient number, since it is larger than the sum of its proper divisors (373501225).

172073257317623 is an equidigital number, since it uses as much as digits as its factorization.

172073257317623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373501224.

The product of its (nonzero) digits is 15558480, while the sum is 56.

The spelling of 172073257317623 in words is "one hundred seventy-two trillion, seventy-three billion, two hundred fifty-seven million, three hundred seventeen thousand, six hundred twenty-three".