172920823683 has 8 divisors (see below), whose sum is σ = 231093573648. Its totient is φ = 115014311424.

The previous prime is 172920823651. The next prime is 172920823723. The reversal of 172920823683 is 386328029271.

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

It is not a de Polignac number, because 172920823683 - 2⁵ = 172920823651 is a prime.

It is a super-2 number, since 2×172920823683² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172920823633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66557910 + ... + 66560507.

It is an arithmetic number, because the mean of its divisors is an integer number (28886696706).

Almost surely, 2^172920823683 is an apocalyptic number.

172920823683 is a deficient number, since it is larger than the sum of its proper divisors (58172749965).

172920823683 is a wasteful number, since it uses less digits than its factorization.

172920823683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133118853.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 172920823683 in words is "one hundred seventy-two billion, nine hundred twenty million, eight hundred twenty-three thousand, six hundred eighty-three".