172706876421 has 8 divisors (see below), whose sum is σ = 240287828160. Its totient is φ = 110131921152.

The previous prime is 172706876417. The next prime is 172706876423. The reversal of 172706876421 is 124678607271.

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

It is not a de Polignac number, because 172706876421 - 2² = 172706876417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172706876423) 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, 1251499036 + ... + 1251499173.

It is an arithmetic number, because the mean of its divisors is an integer number (30035978520).

Almost surely, 2^172706876421 is an apocalyptic number.

It is an amenable number.

172706876421 is a deficient number, since it is larger than the sum of its proper divisors (67580951739).

172706876421 is a wasteful number, since it uses less digits than its factorization.

172706876421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502998235.

The product of its (nonzero) digits is 1580544, while the sum is 51.

The spelling of 172706876421 in words is "one hundred seventy-two billion, seven hundred six million, eight hundred seventy-six thousand, four hundred twenty-one".