26191397841 has 32 divisors (see below), whose sum is σ = 40380768000. Its totient is φ = 14790420480.

The previous prime is 26191397741. The next prime is 26191397851. The reversal of 26191397841 is 14879319162.

It is not a de Polignac number, because 26191397841 - 2¹¹ = 26191395793 is a prime.

It is a super-2 number, since 2×26191397841² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26191397851) 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 31 ways as a sum of consecutive naturals, for example, 6466585 + ... + 6470633.

It is an arithmetic number, because the mean of its divisors is an integer number (1261899000).

Almost surely, 2^26191397841 is an apocalyptic number.

26191397841 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26191397841 is a deficient number, since it is larger than the sum of its proper divisors (14189370159).

26191397841 is a wasteful number, since it uses less digits than its factorization.

26191397841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7609.

The product of its digits is 653184, while the sum is 51.

The spelling of 26191397841 in words is "twenty-six billion, one hundred ninety-one million, three hundred ninety-seven thousand, eight hundred forty-one".