172161155662 has 4 divisors (see below), whose sum is σ = 258241733496. Its totient is φ = 86080577830.

The previous prime is 172161155591. The next prime is 172161155671. The reversal of 172161155662 is 266551161271.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43040288914 + ... + 43040288917.

It is an arithmetic number, because the mean of its divisors is an integer number (64560433374).

Almost surely, 2^172161155662 is an apocalyptic number.

172161155662 is a deficient number, since it is larger than the sum of its proper divisors (86080577834).

172161155662 is an equidigital number, since it uses as much as digits as its factorization.

172161155662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86080577833.

The product of its digits is 151200, while the sum is 43.

The spelling of 172161155662 in words is "one hundred seventy-two billion, one hundred sixty-one million, one hundred fifty-five thousand, six hundred sixty-two".