172816220728094 has 8 divisors (see below), whose sum is σ = 259225249168368. Its totient is φ = 86407804338640.

The previous prime is 172816220728051. The next prime is 172816220728117. The reversal of 172816220728094 is 490827022618271.

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

It is a super-2 number, since 2×172816220728094² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152306162 + ... + 153436629.

It is an arithmetic number, because the mean of its divisors is an integer number (32403156146046).

Almost surely, 2^{172816220728094} is an apocalyptic number.

172816220728094 is a deficient number, since it is larger than the sum of its proper divisors (86409028440274).

172816220728094 is a wasteful number, since it uses less digits than its factorization.

172816220728094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306025410.

The product of its (nonzero) digits is 10838016, while the sum is 59.

The spelling of 172816220728094 in words is "one hundred seventy-two trillion, eight hundred sixteen billion, two hundred twenty million, seven hundred twenty-eight thousand, ninety-four".