172145187663 has 8 divisors (see below), whose sum is σ = 229624555776. Its totient is φ = 114714639000.

The previous prime is 172145187647. The next prime is 172145187667. The reversal of 172145187663 is 366781541271.

It is a happy number.

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

It is not a de Polignac number, because 172145187663 - 2⁴ = 172145187647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172145187667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12196633 + ... + 12210738.

It is an arithmetic number, because the mean of its divisors is an integer number (28703069472).

Almost surely, 2^172145187663 is an apocalyptic number.

172145187663 is a deficient number, since it is larger than the sum of its proper divisors (57479368113).

172145187663 is a wasteful number, since it uses less digits than its factorization.

172145187663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24409725.

The product of its digits is 1693440, while the sum is 51.

The spelling of 172145187663 in words is "one hundred seventy-two billion, one hundred forty-five million, one hundred eighty-seven thousand, six hundred sixty-three".