26281986408 has 80 divisors (see below), whose sum is σ = 75002936580. Its totient is φ = 8595355392.

The previous prime is 26281986407. The next prime is 26281986413. The reversal of 26281986408 is 80468918262.

26281986408 is a `hidden beast` number, since 2 + 628 + 1 + 9 + 8 + 6 + 4 + 0 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26075144484 + 206841924 = 161478^2 + 14382^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (26281986407) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 348285 + ... + 416972.

Almost surely, 2^26281986408 is an apocalyptic number.

It is an amenable number.

26281986408 is an abundant number, since it is smaller than the sum of its proper divisors (48720950172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26281986408 is a wasteful number, since it uses less digits than its factorization.

26281986408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765328 (or 765315 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 26281986408 in words is "twenty-six billion, two hundred eighty-one million, nine hundred eighty-six thousand, four hundred eight".