26378250391 has 8 divisors (see below), whose sum is σ = 26544472560. Its totient is φ = 26212082112.

The previous prime is 26378250377. The next prime is 26378250403. The reversal of 26378250391 is 19305287362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26378250391 - 2⁵ = 26378250359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26378250341) 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 7 ways as a sum of consecutive naturals, for example, 1492281 + ... + 1509853.

It is an arithmetic number, because the mean of its divisors is an integer number (3318059070).

Almost surely, 2^26378250391 is an apocalyptic number.

26378250391 is a deficient number, since it is larger than the sum of its proper divisors (166222169).

26378250391 is a wasteful number, since it uses less digits than its factorization.

26378250391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26945.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 26378250391 in words is "twenty-six billion, three hundred seventy-eight million, two hundred fifty thousand, three hundred ninety-one".