172159743648 has 48 divisors (see below), whose sum is σ = 478502821440. Its totient is φ = 54010899456.

The previous prime is 172159743611. The next prime is 172159743649. The reversal of 172159743648 is 846347951271.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 52743388 + ... + 52746651.

It is an arithmetic number, because the mean of its divisors is an integer number (9968808780).

Almost surely, 2^172159743648 is an apocalyptic number.

It is an amenable number.

172159743648 is an abundant number, since it is smaller than the sum of its proper divisors (306343077792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172159743648 is a wasteful number, since it uses less digits than its factorization.

172159743648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105490069 (or 105490061 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 57.

The spelling of 172159743648 in words is "one hundred seventy-two billion, one hundred fifty-nine million, seven hundred forty-three thousand, six hundred forty-eight".