26148690849 has 4 divisors (see below), whose sum is σ = 34864921136. Its totient is φ = 17432460564.

The previous prime is 26148690817. The next prime is 26148690859. The reversal of 26148690849 is 94809684162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 26148690849 - 2⁵ = 26148690817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26148690809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4358115139 + ... + 4358115144.

It is an arithmetic number, because the mean of its divisors is an integer number (8716230284).

Almost surely, 2^26148690849 is an apocalyptic number.

It is an amenable number.

26148690849 is a deficient number, since it is larger than the sum of its proper divisors (8716230287).

26148690849 is an equidigital number, since it uses as much as digits as its factorization.

26148690849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8716230286.

The product of its (nonzero) digits is 5971968, while the sum is 57.

The spelling of 26148690849 in words is "twenty-six billion, one hundred forty-eight million, six hundred ninety thousand, eight hundred forty-nine".