26484978049 has 4 divisors (see below), whose sum is σ = 26487041364. Its totient is φ = 26482914736.

The previous prime is 26484978017. The next prime is 26484978059. The reversal of 26484978049 is 94087948462.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4457965824 + 22027012225 = 66768^2 + 148415^2 .

It is a cyclic number.

It is not a de Polignac number, because 26484978049 - 2⁵ = 26484978017 is a prime.

It is a super-3 number, since 3×26484978049³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26484978059) 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 3 ways as a sum of consecutive naturals, for example, 1012282 + ... + 1038115.

It is an arithmetic number, because the mean of its divisors is an integer number (6621760341).

Almost surely, 2^26484978049 is an apocalyptic number.

It is an amenable number.

26484978049 is a deficient number, since it is larger than the sum of its proper divisors (2063315).

26484978049 is a wasteful number, since it uses less digits than its factorization.

26484978049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063314.

The product of its (nonzero) digits is 27869184, while the sum is 61.

The spelling of 26484978049 in words is "twenty-six billion, four hundred eighty-four million, nine hundred seventy-eight thousand, forty-nine".