26540117421 has 4 divisors (see below), whose sum is σ = 35386823232. Its totient is φ = 17693411612.

The previous prime is 26540117399. The next prime is 26540117431. The reversal of 26540117421 is 12471104562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26540117421 - 2⁷ = 26540117293 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26540117431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4423352901 + ... + 4423352906.

It is an arithmetic number, because the mean of its divisors is an integer number (8846705808).

Almost surely, 2^26540117421 is an apocalyptic number.

It is an amenable number.

26540117421 is a deficient number, since it is larger than the sum of its proper divisors (8846705811).

26540117421 is an equidigital number, since it uses as much as digits as its factorization.

26540117421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8846705810.

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 26540117421 in words is "twenty-six billion, five hundred forty million, one hundred seventeen thousand, four hundred twenty-one".