26678983491 has 12 divisors (see below), whose sum is σ = 39263410368. Its totient is φ = 17450403984.

The previous prime is 26678983483. The next prime is 26678983493. The reversal of 26678983491 is 19438987662.

26678983491 is a `hidden beast` number, since 2 + 6 + 67 + 8 + 9 + 83 + 491 = 666.

It is not a de Polignac number, because 26678983491 - 2³ = 26678983483 is a prime.

It is a super-2 number, since 2×26678983491² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26678983493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27964915 + ... + 27965868.

It is an arithmetic number, because the mean of its divisors is an integer number (3271950864).

Almost surely, 2^26678983491 is an apocalyptic number.

26678983491 is a deficient number, since it is larger than the sum of its proper divisors (12584426877).

26678983491 is a wasteful number, since it uses less digits than its factorization.

26678983491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55930842 (or 55930839 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The spelling of 26678983491 in words is "twenty-six billion, six hundred seventy-eight million, nine hundred eighty-three thousand, four hundred ninety-one".