172890442889 has 8 divisors (see below), whose sum is σ = 173883474048. Its totient is φ = 171899442000.

The previous prime is 172890442883. The next prime is 172890442897. The reversal of 172890442889 is 988244098271.

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

It is a cyclic number.

It is not a de Polignac number, because 172890442889 - 2³⁶ = 104170966153 is a prime.

It is a super-2 number, since 2×172890442889² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172890442883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336602 + ... + 677555.

It is an arithmetic number, because the mean of its divisors is an integer number (21735434256).

Almost surely, 2^172890442889 is an apocalyptic number.

It is an amenable number.

172890442889 is a deficient number, since it is larger than the sum of its proper divisors (993031159).

172890442889 is a wasteful number, since it uses less digits than its factorization.

172890442889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015135.

The product of its (nonzero) digits is 18579456, while the sum is 62.

The spelling of 172890442889 in words is "one hundred seventy-two billion, eight hundred ninety million, four hundred forty-two thousand, eight hundred eighty-nine".