172217055670 has 64 divisors (see below), whose sum is σ = 343321804800. Its totient is φ = 61674687360.

The previous prime is 172217055649. The next prime is 172217055671. The reversal of 172217055670 is 76550712271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172217055671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3424971 + ... + 3474889.

It is an arithmetic number, because the mean of its divisors is an integer number (5364403200).

Almost surely, 2^172217055670 is an apocalyptic number.

172217055670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172217055670 is a deficient number, since it is larger than the sum of its proper divisors (171104749130).

172217055670 is a wasteful number, since it uses less digits than its factorization.

172217055670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50413.

The product of its (nonzero) digits is 205800, while the sum is 43.

The spelling of 172217055670 in words is "one hundred seventy-two billion, two hundred seventeen million, fifty-five thousand, six hundred seventy".