26427923008391 has 4 divisors (see below), whose sum is σ = 26427944310432. Its totient is φ = 26427901706352.

The previous prime is 26427923008381. The next prime is 26427923008411. The reversal of 26427923008391 is 19380032972462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26427923008391 - 2⁴² = 22029876497287 is a prime.

It is a super-2 number, since 2×26427923008391² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26427923008381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8666870 + ... + 11312403.

It is an arithmetic number, because the mean of its divisors is an integer number (6606986077608).

Almost surely, 2^{26427923008391} is an apocalyptic number.

26427923008391 is a deficient number, since it is larger than the sum of its proper divisors (21302041).

26427923008391 is a wasteful number, since it uses less digits than its factorization.

26427923008391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21302040.

The product of its (nonzero) digits is 7838208, while the sum is 56.

The spelling of 26427923008391 in words is "twenty-six trillion, four hundred twenty-seven billion, nine hundred twenty-three million, eight thousand, three hundred ninety-one".