181420486183939 has 16 divisors (see below), whose sum is σ = 188371831440384. Its totient is φ = 174538011463200.

The previous prime is 181420486183927. The next prime is 181420486184009. The reversal of 181420486183939 is 939381684024181.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181420486183939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181420486183919) 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, 59714932 + ... + 62679454.

It is an arithmetic number, because the mean of its divisors is an integer number (11773239465024).

Almost surely, 2^{181420486183939} is an apocalyptic number.

181420486183939 is a deficient number, since it is larger than the sum of its proper divisors (6951345256445).

181420486183939 is a wasteful number, since it uses less digits than its factorization.

181420486183939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976138.

The product of its (nonzero) digits is 71663616, while the sum is 67.

The spelling of 181420486183939 in words is "one hundred eighty-one trillion, four hundred twenty billion, four hundred eighty-six million, one hundred eighty-three thousand, nine hundred thirty-nine".