26205961409 has 16 divisors (see below), whose sum is σ = 27408015360. Its totient is φ = 25031726160.

The previous prime is 26205961391. The next prime is 26205961427. The reversal of 26205961409 is 90416950262.

It is an interprime number because it is at equal distance from previous prime (26205961391) and next prime (26205961427).

It is a cyclic number.

It is not a de Polignac number, because 26205961409 - 2²⁸ = 25937525953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26205961409.

It is not an unprimeable number, because it can be changed into a prime (26205961469) 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, 2903714 + ... + 2912724.

It is an arithmetic number, because the mean of its divisors is an integer number (1713000960).

Almost surely, 2^26205961409 is an apocalyptic number.

It is an amenable number.

26205961409 is a deficient number, since it is larger than the sum of its proper divisors (1202053951).

26205961409 is a wasteful number, since it uses less digits than its factorization.

26205961409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10540.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 26205961409 in words is "twenty-six billion, two hundred five million, nine hundred sixty-one thousand, four hundred nine".