181403024336836 has 9 divisors (see below), whose sum is σ = 317455339729549. Its totient is φ = 90701498699824.

The previous prime is 181403024336813. The next prime is 181403024336839. The reversal of 181403024336836 is 638633420304181.

The square root of 181403024336836 is 13468594.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 70813739708100 + 110589284628736 = 8415090^2 + 10516144^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181403024336839) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 23570040 + ... + 30304336.

Almost surely, 2^{181403024336836} is an apocalyptic number.

181403024336836 is the 13468594-th square number.

It is an amenable number.

181403024336836 is a deficient number, since it is larger than the sum of its proper divisors (136052315392713).

181403024336836 is an frugal number, since it uses more digits than its factorization.

181403024336836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13468598 (or 6734299 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 52.

The spelling of 181403024336836 in words is "one hundred eighty-one trillion, four hundred three billion, twenty-four million, three hundred thirty-six thousand, eight hundred thirty-six".