191708426013 has 16 divisors (see below), whose sum is σ = 275283978816. Its totient is φ = 117969984000.

The previous prime is 191708426003. The next prime is 191708426047. The reversal of 191708426013 is 310624807191.

It is a happy number.

It is not a de Polignac number, because 191708426013 - 2⁵ = 191708425981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191708426003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1181581 + ... + 1333997.

It is an arithmetic number, because the mean of its divisors is an integer number (17205248676).

Almost surely, 2^191708426013 is an apocalyptic number.

191708426013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

191708426013 is a deficient number, since it is larger than the sum of its proper divisors (83575552803).

191708426013 is a wasteful number, since it uses less digits than its factorization.

191708426013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184684.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 191708426013 in words is "one hundred ninety-one billion, seven hundred eight million, four hundred twenty-six thousand, thirteen".