6398731693226 has 4 divisors (see below), whose sum is σ = 9598097539842. Its totient is φ = 3199365846612.

The previous prime is 6398731693223. The next prime is 6398731693247. The reversal of 6398731693226 is 6223961378936.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6110363767225 + 288367926001 = 2471915^2 + 536999^2 .

It is not an unprimeable number, because it can be changed into a prime (6398731693223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1599682923305 + ... + 1599682923308.

Almost surely, 2^{6398731693226} is an apocalyptic number.

6398731693226 is a deficient number, since it is larger than the sum of its proper divisors (3199365846616).

6398731693226 is a wasteful number, since it uses less digits than its factorization.

6398731693226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199365846615.

The product of its digits is 105815808, while the sum is 65.

The spelling of 6398731693226 in words is "six trillion, three hundred ninety-eight billion, seven hundred thirty-one million, six hundred ninety-three thousand, two hundred twenty-six".