181000564047 has 6 divisors (see below), whose sum is σ = 261445259192. Its totient is φ = 120667042692.

The previous prime is 181000564037. The next prime is 181000564103. The reversal of 181000564047 is 740465000181.

It is a happy number.

181000564047 is a `hidden beast` number, since 1 + 8 + 1 + 0 + 0 + 0 + 5 + 640 + 4 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-181000564047 is a prime.

It is a super-2 number, since 2×181000564047² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181000564037) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10055586883 + ... + 10055586900.

Almost surely, 2^181000564047 is an apocalyptic number.

181000564047 is a deficient number, since it is larger than the sum of its proper divisors (80444695145).

181000564047 is a wasteful number, since it uses less digits than its factorization.

181000564047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20111173789 (or 20111173786 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 181000564047 in words is "one hundred eighty-one billion, five hundred sixty-four thousand, forty-seven".