26458227691 has 32 divisors (see below), whose sum is σ = 31656268800. Its totient is φ = 21634542720.

The previous prime is 26458227689. The next prime is 26458227713. The reversal of 26458227691 is 19672285462.

It is a happy number.

It is not a de Polignac number, because 26458227691 - 2¹ = 26458227689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26458227671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11310600 + ... + 11312938.

It is an arithmetic number, because the mean of its divisors is an integer number (989258400).

Almost surely, 2^26458227691 is an apocalyptic number.

26458227691 is a deficient number, since it is larger than the sum of its proper divisors (5198041109).

26458227691 is a wasteful number, since it uses less digits than its factorization.

26458227691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3019.

The product of its digits is 2903040, while the sum is 52.

The spelling of 26458227691 in words is "twenty-six billion, four hundred fifty-eight million, two hundred twenty-seven thousand, six hundred ninety-one".