172072848751817 has 24 divisors (see below), whose sum is σ = 191658824299008. Its totient is φ = 154330338052800.

The previous prime is 172072848751759. The next prime is 172072848751883. The reversal of 172072848751817 is 718157848270271.

It is a happy number.

It is not a de Polignac number, because 172072848751817 - 2⁸ = 172072848751561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172072848711817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60598034 + ... + 63374027.

It is an arithmetic number, because the mean of its divisors is an integer number (7985784345792).

Almost surely, 2^{172072848751817} is an apocalyptic number.

It is an amenable number.

172072848751817 is a deficient number, since it is larger than the sum of its proper divisors (19585975547191).

172072848751817 is a wasteful number, since it uses less digits than its factorization.

172072848751817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123972321 (or 123972308 counting only the distinct ones).

The product of its (nonzero) digits is 98344960, while the sum is 68.

The spelling of 172072848751817 in words is "one hundred seventy-two trillion, seventy-two billion, eight hundred forty-eight million, seven hundred fifty-one thousand, eight hundred seventeen".