133951986171 has 16 divisors (see below), whose sum is σ = 198466424320. Its totient is φ = 89292757320.

The previous prime is 133951986169. The next prime is 133951986193. The reversal of 133951986171 is 171689159331.

133951986171 is a `hidden beast` number, since 1 + 3 + 3 + 9 + 5 + 19 + 8 + 617 + 1 = 666.

It is not a de Polignac number, because 133951986171 - 2¹ = 133951986169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133951986671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55266 + ... + 520536.

It is an arithmetic number, because the mean of its divisors is an integer number (12404151520).

Almost surely, 2^133951986171 is an apocalyptic number.

133951986171 is a deficient number, since it is larger than the sum of its proper divisors (64514438149).

133951986171 is a wasteful number, since it uses less digits than its factorization.

133951986171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475943 (or 475937 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The spelling of 133951986171 in words is "one hundred thirty-three billion, nine hundred fifty-one million, nine hundred eighty-six thousand, one hundred seventy-one".