26427891405 has 8 divisors (see below), whose sum is σ = 42284626272. Its totient is φ = 14094875408.

The previous prime is 26427891379. The next prime is 26427891431. The reversal of 26427891405 is 50419872462.

It is an interprime number because it is at equal distance from previous prime (26427891379) and next prime (26427891431).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26427891405 - 2⁶ = 26427891341 is a prime.

It is a super-2 number, since 2×26427891405² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 880929699 + ... + 880929728.

It is an arithmetic number, because the mean of its divisors is an integer number (5285578284).

Almost surely, 2^26427891405 is an apocalyptic number.

It is an amenable number.

26427891405 is a deficient number, since it is larger than the sum of its proper divisors (15856734867).

26427891405 is a wasteful number, since it uses less digits than its factorization.

26427891405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761859435.

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 26427891405 in words is "twenty-six billion, four hundred twenty-seven million, eight hundred ninety-one thousand, four hundred five".