16782681434 has 8 divisors (see below), whose sum is σ = 25177004820. Its totient is φ = 8390346496.

The previous prime is 16782681427. The next prime is 16782681479. The reversal of 16782681434 is 43418628761.

It can be written as a sum of positive squares in 2 ways, for example, as 15335107225 + 1447574209 = 123835^2 + 38047^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×16782681434² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475829 + ... + 509880.

Almost surely, 2^16782681434 is an apocalyptic number.

16782681434 is a deficient number, since it is larger than the sum of its proper divisors (8394323386).

16782681434 is an equidigital number, since it uses as much as digits as its factorization.

16782681434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994224.

The product of its digits is 1548288, while the sum is 50.

The spelling of 16782681434 in words is "sixteen billion, seven hundred eighty-two million, six hundred eighty-one thousand, four hundred thirty-four".