172228152609 has 40 divisors (see below), whose sum is σ = 277425566880. Its totient is φ = 106122571200.

The previous prime is 172228152599. The next prime is 172228152631. The reversal of 172228152609 is 906251822271.

172228152609 is a `hidden beast` number, since 1 + 7 + 2 + 2 + 28 + 15 + 2 + 609 = 666.

It is not a de Polignac number, because 172228152609 - 2⁹ = 172228152097 is a prime.

It is a super-2 number, since 2×172228152609² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172228153609) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1301647 + ... + 1427844.

It is an arithmetic number, because the mean of its divisors is an integer number (6935639172).

Almost surely, 2^172228152609 is an apocalyptic number.

172228152609 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

172228152609 is a deficient number, since it is larger than the sum of its proper divisors (105197414271).

172228152609 is a wasteful number, since it uses less digits than its factorization.

172228152609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729563 (or 2729554 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 172228152609 in words is "one hundred seventy-two billion, two hundred twenty-eight million, one hundred fifty-two thousand, six hundred nine".