171641249899 has 12 divisors (see below), whose sum is σ = 200294185104. Its totient is φ = 146656953744.

The previous prime is 171641249891. The next prime is 171641249947. The reversal of 171641249899 is 998942146171.

It is not a de Polignac number, because 171641249899 - 2³ = 171641249891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171641249891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5509519 + ... + 5540584.

It is an arithmetic number, because the mean of its divisors is an integer number (16691182092).

Almost surely, 2^171641249899 is an apocalyptic number.

171641249899 is a deficient number, since it is larger than the sum of its proper divisors (28652935205).

171641249899 is a wasteful number, since it uses less digits than its factorization.

171641249899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11050434 (or 11050427 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 61.

The spelling of 171641249899 in words is "one hundred seventy-one billion, six hundred forty-one million, two hundred forty-nine thousand, eight hundred ninety-nine".