26040340221 has 16 divisors (see below), whose sum is σ = 39693836928. Its totient is φ = 14875200000.

The previous prime is 26040340147. The next prime is 26040340253. The reversal of 26040340221 is 12204304062.

It is not a de Polignac number, because 26040340221 - 2¹⁰ = 26040339197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26040340191 and 26040340200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26040340021) 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, 143580 + ... + 269621.

It is an arithmetic number, because the mean of its divisors is an integer number (2480864808).

Almost surely, 2^26040340221 is an apocalyptic number.

26040340221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26040340221 is a deficient number, since it is larger than the sum of its proper divisors (13653496707).

26040340221 is a wasteful number, since it uses less digits than its factorization.

26040340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416212.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 26040340221 its reverse (12204304062), we get a palindrome (38244644283).

The spelling of 26040340221 in words is "twenty-six billion, forty million, three hundred forty thousand, two hundred twenty-one".