26403432659 has 6 divisors (see below), whose sum is σ = 27601320516. Its totient is φ = 25255456820.

The previous prime is 26403432637. The next prime is 26403432673. The reversal of 26403432659 is 95623430462.

It is a happy number.

It is not a de Polignac number, because 26403432659 - 2²⁴ = 26386655443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26403432059) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24955457 + ... + 24956514.

It is an arithmetic number, because the mean of its divisors is an integer number (4600220086).

Almost surely, 2^26403432659 is an apocalyptic number.

26403432659 is a deficient number, since it is larger than the sum of its proper divisors (1197887857).

26403432659 is an equidigital number, since it uses as much as digits as its factorization.

26403432659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49912017 (or 49911994 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 44.

The spelling of 26403432659 in words is "twenty-six billion, four hundred three million, four hundred thirty-two thousand, six hundred fifty-nine".