184606751981 has 2 divisors, whose sum is σ = 184606751982. Its totient is φ = 184606751980.

The previous prime is 184606751971. The next prime is 184606752061. The reversal of 184606751981 is 189157606481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144312613225 + 40294138756 = 379885^2 + 200734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-184606751981 is a prime.

It is a super-2 number, since 2×184606751981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (184606751971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92303375990 + 92303375991.

It is an arithmetic number, because the mean of its divisors is an integer number (92303375991).

Almost surely, 2^184606751981 is an apocalyptic number.

It is an amenable number.

184606751981 is a deficient number, since it is larger than the sum of its proper divisors (1).

184606751981 is an equidigital number, since it uses as much as digits as its factorization.

184606751981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The spelling of 184606751981 in words is "one hundred eighty-four billion, six hundred six million, seven hundred fifty-one thousand, nine hundred eighty-one".