191513681426 has 16 divisors (see below), whose sum is σ = 289640420160. Its totient is φ = 94968925200.

The previous prime is 191513681393. The next prime is 191513681431. The reversal of 191513681426 is 624186315191.

191513681426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 325301 + ... + 699176.

It is an arithmetic number, because the mean of its divisors is an integer number (18102526260).

Almost surely, 2^191513681426 is an apocalyptic number.

191513681426 is a deficient number, since it is larger than the sum of its proper divisors (98126738734).

191513681426 is a wasteful number, since it uses less digits than its factorization.

191513681426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025249.

The product of its digits is 311040, while the sum is 47.

The spelling of 191513681426 in words is "one hundred ninety-one billion, five hundred thirteen million, six hundred eighty-one thousand, four hundred twenty-six".