172211719688 has 12 divisors (see below), whose sum is σ = 322899175215. Its totient is φ = 86105272968.

The previous prime is 172211719657. The next prime is 172211719717. The reversal of 172211719688 is 886917112271.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 86105859844 + 86105859844 = 293438^2 + 293438^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=293438.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1100393 + ... + 1247111.

Almost surely, 2^172211719688 is an apocalyptic number.

It is an amenable number.

172211719688 is a deficient number, since it is larger than the sum of its proper divisors (150687455527).

172211719688 is an frugal number, since it uses more digits than its factorization.

172211719688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293444 (or 146721 counting only the distinct ones).

The product of its digits is 677376, while the sum is 53.

The spelling of 172211719688 in words is "one hundred seventy-two billion, two hundred eleven million, seven hundred nineteen thousand, six hundred eighty-eight".