26378128903 has 4 divisors (see below), whose sum is σ = 30146433040. Its totient is φ = 22609824768.

The previous prime is 26378128891. The next prime is 26378128913. The reversal of 26378128903 is 30982187362.

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

It is a cyclic number.

It is not a de Polignac number, because 26378128903 - 2¹³ = 26378120711 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 (26378128913) 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, 1884152058 + ... + 1884152071.

It is an arithmetic number, because the mean of its divisors is an integer number (7536608260).

Almost surely, 2^26378128903 is an apocalyptic number.

26378128903 is a deficient number, since it is larger than the sum of its proper divisors (3768304137).

26378128903 is an equidigital number, since it uses as much as digits as its factorization.

26378128903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3768304136.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 26378128903 in words is "twenty-six billion, three hundred seventy-eight million, one hundred twenty-eight thousand, nine hundred three".