172873426501 has 4 divisors (see below), whose sum is σ = 173562165504. Its totient is φ = 172184687500.

The previous prime is 172873426493. The next prime is 172873426507. The reversal of 172873426501 is 105624378271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172873426501 - 2³ = 172873426493 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 (172873426507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344369125 + ... + 344369626.

It is an arithmetic number, because the mean of its divisors is an integer number (43390541376).

Almost surely, 2^172873426501 is an apocalyptic number.

It is an amenable number.

172873426501 is a deficient number, since it is larger than the sum of its proper divisors (688739003).

172873426501 is an equidigital number, since it uses as much as digits as its factorization.

172873426501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688739002.

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 172873426501 in words is "one hundred seventy-two billion, eight hundred seventy-three million, four hundred twenty-six thousand, five hundred one".