181474706729 has 2 divisors, whose sum is σ = 181474706730. Its totient is φ = 181474706728.

The previous prime is 181474706681. The next prime is 181474706737. The reversal of 181474706729 is 927607474181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128484968704 + 52989738025 = 358448^2 + 230195^2 .

It is a cyclic number.

It is not a de Polignac number, because 181474706729 - 2³² = 177179739433 is a prime.

It is not a weakly prime, because it can be changed into another prime (181474706029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90737353364 + 90737353365.

It is an arithmetic number, because the mean of its divisors is an integer number (90737353365).

Almost surely, 2^181474706729 is an apocalyptic number.

It is an amenable number.

181474706729 is a deficient number, since it is larger than the sum of its proper divisors (1).

181474706729 is an equidigital number, since it uses as much as digits as its factorization.

181474706729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4741632, while the sum is 56.

The spelling of 181474706729 in words is "one hundred eighty-one billion, four hundred seventy-four million, seven hundred six thousand, seven hundred twenty-nine".