172673732890 has 8 divisors (see below), whose sum is σ = 310812719220. Its totient is φ = 69069493152.

The previous prime is 172673732863. The next prime is 172673732893. The reversal of 172673732890 is 98237376271.

It can be written as a sum of positive squares in 2 ways, for example, as 156856394601 + 15817338289 = 396051^2 + 125767^2 .

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

It is not an unprimeable number, because it can be changed into a prime (172673732893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8633686635 + ... + 8633686654.

Almost surely, 2^172673732890 is an apocalyptic number.

172673732890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172673732890 is a deficient number, since it is larger than the sum of its proper divisors (138138986330).

172673732890 is a wasteful number, since it uses less digits than its factorization.

172673732890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17267373296.

The product of its (nonzero) digits is 5334336, while the sum is 55.

The spelling of 172673732890 in words is "one hundred seventy-two billion, six hundred seventy-three million, seven hundred thirty-two thousand, eight hundred ninety".