181881358083 has 12 divisors (see below), whose sum is σ = 276544755240. Its totient is φ = 114872436576.

The previous prime is 181881358079. The next prime is 181881358091. The reversal of 181881358083 is 380853188181.

It is not a de Polignac number, because 181881358083 - 2² = 181881358079 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (181881358093) 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, 531816666 + ... + 531817007.

It is an arithmetic number, because the mean of its divisors is an integer number (23045396270).

Almost surely, 2^181881358083 is an apocalyptic number.

181881358083 is a deficient number, since it is larger than the sum of its proper divisors (94663397157).

181881358083 is a wasteful number, since it uses less digits than its factorization.

181881358083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063633698 (or 1063633695 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 54.

The spelling of 181881358083 in words is "one hundred eighty-one billion, eight hundred eighty-one million, three hundred fifty-eight thousand, eighty-three".