172268906842 has 4 divisors (see below), whose sum is σ = 258403360266. Its totient is φ = 86134453420.

The previous prime is 172268906827. The next prime is 172268906851. The reversal of 172268906842 is 248609862271.

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

It can be written as a sum of positive squares in only one way, i.e., 108300886281 + 63968020561 = 329091^2 + 252919^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43067226709 + ... + 43067226712.

Almost surely, 2^172268906842 is an apocalyptic number.

172268906842 is a deficient number, since it is larger than the sum of its proper divisors (86134453424).

172268906842 is an equidigital number, since it uses as much as digits as its factorization.

172268906842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86134453423.

The product of its (nonzero) digits is 4644864, while the sum is 55.

The spelling of 172268906842 in words is "one hundred seventy-two billion, two hundred sixty-eight million, nine hundred six thousand, eight hundred forty-two".