26513520516440 has 32 divisors (see below), whose sum is σ = 59660375780880. Its totient is φ = 10604527385472.

The previous prime is 26513520516421. The next prime is 26513520516449. The reversal of 26513520516440 is 4461502531562.

It is a junction number, because it is equal to n+sod(n) for n = 26513520516391 and 26513520516400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26513520516449) 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, 27037919 + ... + 28001358.

Almost surely, 2^{26513520516440} is an apocalyptic number.

26513520516440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26513520516440 is an abundant number, since it is smaller than the sum of its proper divisors (33146855264440).

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

26513520516440 is a wasteful number, since it uses less digits than its factorization.

26513520516440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55051331 (or 55051327 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 26513520516440 in words is "twenty-six trillion, five hundred thirteen billion, five hundred twenty million, five hundred sixteen thousand, four hundred forty".