181209732994968 has 16 divisors (see below), whose sum is σ = 453024332487480. Its totient is φ = 60403244331648.

The previous prime is 181209732994933. The next prime is 181209732994981. The reversal of 181209732994968 is 869499237902181.

It is a super-2 number, since 2×181209732994968² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 181209732994893 and 181209732994902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3775202770705 + ... + 3775202770752.

Almost surely, 2^{181209732994968} is an apocalyptic number.

It is an amenable number.

181209732994968 is an abundant number, since it is smaller than the sum of its proper divisors (271814599492512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181209732994968 is a wasteful number, since it uses less digits than its factorization.

181209732994968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7550405541466 (or 7550405541462 counting only the distinct ones).

The product of its (nonzero) digits is 846526464, while the sum is 78.

The spelling of 181209732994968 in words is "one hundred eighty-one trillion, two hundred nine billion, seven hundred thirty-two million, nine hundred ninety-four thousand, nine hundred sixty-eight".