172159743647 has 4 divisors (see below), whose sum is σ = 172829626176. Its totient is φ = 171489861120.

The previous prime is 172159743611. The next prime is 172159743649. The reversal of 172159743647 is 746347951271.

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

It is a cyclic number.

It is not a de Polignac number, because 172159743647 - 2⁸ = 172159743391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172159743592 and 172159743601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172159743649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334940879 + ... + 334941392.

It is an arithmetic number, because the mean of its divisors is an integer number (43207406544).

Almost surely, 2^172159743647 is an apocalyptic number.

172159743647 is a deficient number, since it is larger than the sum of its proper divisors (669882529).

172159743647 is an equidigital number, since it uses as much as digits as its factorization.

172159743647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669882528.

The product of its digits is 8890560, while the sum is 56.

The spelling of 172159743647 in words is "one hundred seventy-two billion, one hundred fifty-nine million, seven hundred forty-three thousand, six hundred forty-seven".