172939266456 has 72 divisors (see below), whose sum is σ = 475287259860. Its totient is φ = 52399047360.

The previous prime is 172939266419. The next prime is 172939266463. The reversal of 172939266456 is 654662939271.

172939266456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 172939266456.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22406310 + ... + 22414026.

Almost surely, 2^172939266456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172939266456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237643629930).

172939266456 is an abundant number, since it is smaller than the sum of its proper divisors (302347993404).

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

172939266456 is an frugal number, since it uses more digits than its factorization.

172939266456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15465 (or 7733 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 60.

The spelling of 172939266456 in words is "one hundred seventy-two billion, nine hundred thirty-nine million, two hundred sixty-six thousand, four hundred fifty-six".