172722911973 has 8 divisors (see below), whose sum is σ = 230523223200. Its totient is φ = 115035604368.

The previous prime is 172722911971. The next prime is 172722911993. The reversal of 172722911973 is 379119227271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172722911973 - 2¹ = 172722911971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172722911971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28247338 + ... + 28253451.

It is an arithmetic number, because the mean of its divisors is an integer number (28815402900).

Almost surely, 2^172722911973 is an apocalyptic number.

It is an amenable number.

172722911973 is a deficient number, since it is larger than the sum of its proper divisors (57800311227).

172722911973 is a wasteful number, since it uses less digits than its factorization.

172722911973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56501811.

The product of its digits is 666792, while the sum is 51.

The spelling of 172722911973 in words is "one hundred seventy-two billion, seven hundred twenty-two million, nine hundred eleven thousand, nine hundred seventy-three".