12781091026 has 8 divisors (see below), whose sum is σ = 20914512624. Its totient is φ = 5809586820.

The previous prime is 12781091017. The next prime is 12781091027. The reversal of 12781091026 is 62019018721.

12781091026 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (12781091027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290479320 + ... + 290479363.

It is an arithmetic number, because the mean of its divisors is an integer number (2614314078).

Almost surely, 2^12781091026 is an apocalyptic number.

12781091026 is a deficient number, since it is larger than the sum of its proper divisors (8133421598).

12781091026 is a wasteful number, since it uses less digits than its factorization.

12781091026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580958696.

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 12781091026 in words is "twelve billion, seven hundred eighty-one million, ninety-one thousand, twenty-six".