26119437649 has 4 divisors (see below), whose sum is σ = 26119962036. Its totient is φ = 26118913264.

The previous prime is 26119437563. The next prime is 26119437661. The reversal of 26119437649 is 94673491162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94673491162 = 2 ⋅47336745581.

It can be written as a sum of positive squares in 2 ways, for example, as 13146227649 + 12973210000 = 114657^2 + 113900^2 .

It is a cyclic number.

It is not a de Polignac number, because 26119437649 - 2⁷ = 26119437521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26119437596 and 26119437605.

It is not an unprimeable number, because it can be changed into a prime (26119437689) 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 in 3 ways as a sum of consecutive naturals, for example, 178594 + ... + 290059.

It is an arithmetic number, because the mean of its divisors is an integer number (6529990509).

Almost surely, 2^26119437649 is an apocalyptic number.

It is an amenable number.

26119437649 is a deficient number, since it is larger than the sum of its proper divisors (524387).

26119437649 is an equidigital number, since it uses as much as digits as its factorization.

26119437649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524386.

The product of its digits is 1959552, while the sum is 52.

The spelling of 26119437649 in words is "twenty-six billion, one hundred nineteen million, four hundred thirty-seven thousand, six hundred forty-nine".