181166552575 has 12 divisors (see below), whose sum is σ = 224707502968. Its totient is φ = 144893901600.

The previous prime is 181166552551. The next prime is 181166552591. The reversal of 181166552575 is 575255661181.

It is not a de Polignac number, because 181166552575 - 2¹¹ = 181166550527 is a prime.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 889392 + ... + 1073941.

Almost surely, 2^181166552575 is an apocalyptic number.

181166552575 is a deficient number, since it is larger than the sum of its proper divisors (43540950393).

181166552575 is a wasteful number, since it uses less digits than its factorization.

181166552575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967034 (or 1967029 counting only the distinct ones).

The product of its digits is 2520000, while the sum is 52.

The spelling of 181166552575 in words is "one hundred eighty-one billion, one hundred sixty-six million, five hundred fifty-two thousand, five hundred seventy-five".