26048991609 has 45 divisors (see below), whose sum is σ = 39585875637. Its totient is φ = 17070637896.

The previous prime is 26048991601. The next prime is 26048991613. The reversal of 26048991609 is 90619984062.

The square root of 26048991609 is 161397.

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

26048991609 is a `hidden beast` number, since 26 + 0 + 4 + 8 + 9 + 9 + 1 + 609 = 666.

It is not a de Polignac number, because 26048991609 - 2³ = 26048991601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26048991601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 114753154 + ... + 114753380.

Almost surely, 2^26048991609 is an apocalyptic number.

26048991609 is the 161397-th square number.

26048991609 is the 80699-th centered octagonal number.

It is an amenable number.

26048991609 is a deficient number, since it is larger than the sum of its proper divisors (13536884028).

26048991609 is an frugal number, since it uses more digits than its factorization.

26048991609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 26048991609 in words is "twenty-six billion, forty-eight million, nine hundred ninety-one thousand, six hundred nine".