26521869492 has 72 divisors (see below), whose sum is σ = 70978121760. Its totient is φ = 8326877760.

The previous prime is 26521869481. The next prime is 26521869499. The reversal of 26521869492 is 29496812562.

26521869492 is a `hidden beast` number, since 26 + 52 + 1 + 86 + 9 + 492 = 666.

It is a super-2 number, since 2×26521869492² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26521869499) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6267 + ... + 230397.

Almost surely, 2^26521869492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26521869492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35489060880).

26521869492 is an abundant number, since it is smaller than the sum of its proper divisors (44456252268).

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

26521869492 is a wasteful number, since it uses less digits than its factorization.

26521869492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224333 (or 224328 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The spelling of 26521869492 in words is "twenty-six billion, five hundred twenty-one million, eight hundred sixty-nine thousand, four hundred ninety-two".