26478885291 has 8 divisors (see below), whose sum is σ = 35307028944. Its totient is φ = 17651665920.

The previous prime is 26478885289. The next prime is 26478885373. The reversal of 26478885291 is 19258887462.

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

It is not a de Polignac number, because 26478885291 - 2¹ = 26478885289 is a prime.

It is a super-2 number, since 2×26478885291² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26478885221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161206 + ... + 280971.

It is an arithmetic number, because the mean of its divisors is an integer number (4413378618).

Almost surely, 2^26478885291 is an apocalyptic number.

26478885291 is a deficient number, since it is larger than the sum of its proper divisors (8828143653).

26478885291 is a wasteful number, since it uses less digits than its factorization.

26478885291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462141.

The product of its digits is 15482880, while the sum is 60.

The spelling of 26478885291 in words is "twenty-six billion, four hundred seventy-eight million, eight hundred eighty-five thousand, two hundred ninety-one".