26198983321 has 27 divisors (see below), whose sum is σ = 32191261119. Its totient is φ = 21256881408.

The previous prime is 26198983301. The next prime is 26198983387. The reversal of 26198983321 is 12338989162.

The square root of 26198983321 is 161861.

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., 8791875225 + 17407108096 = 93765^2 + 131936^2 .

It is not a de Polignac number, because 26198983321 - 2⁷ = 26198983193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26198983301) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 21526905 + ... + 21528121.

Almost surely, 2^26198983321 is an apocalyptic number.

26198983321 is the 161861-st square number.

26198983321 is the 80931-st centered octagonal number.

It is an amenable number.

26198983321 is a deficient number, since it is larger than the sum of its proper divisors (5992277798).

26198983321 is an frugal number, since it uses more digits than its factorization.

26198983321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486 (or 1243 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 52.

The spelling of 26198983321 in words is "twenty-six billion, one hundred ninety-eight million, nine hundred eighty-three thousand, three hundred twenty-one".