172426873655 has 8 divisors (see below), whose sum is σ = 206972018592. Its totient is φ = 137901652128.

The previous prime is 172426873649. The next prime is 172426873657. The reversal of 172426873655 is 556378624271.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172426873655 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172426873655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172426873657) 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, 4961804 + ... + 4996433.

It is an arithmetic number, because the mean of its divisors is an integer number (25871502324).

Almost surely, 2^172426873655 is an apocalyptic number.

172426873655 is a deficient number, since it is larger than the sum of its proper divisors (34545144937).

172426873655 is an equidigital number, since it uses as much as digits as its factorization.

172426873655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9961705.

The product of its digits is 16934400, while the sum is 56.

The spelling of 172426873655 in words is "one hundred seventy-two billion, four hundred twenty-six million, eight hundred seventy-three thousand, six hundred fifty-five".