26405335540 has 48 divisors (see below), whose sum is σ = 56616356160. Its totient is φ = 10341632000.

The previous prime is 26405335531. The next prime is 26405335549. The reversal of 26405335540 is 4553350462.

It is an interprime number because it is at equal distance from previous prime (26405335531) and next prime (26405335549).

It is a self number, because there is not a number n which added to its sum of digits gives 26405335540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26405335549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251604 + ... + 340756.

It is an arithmetic number, because the mean of its divisors is an integer number (1179507420).

Almost surely, 2^26405335540 is an apocalyptic number.

26405335540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26405335540 is an abundant number, since it is smaller than the sum of its proper divisors (30211020620).

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

26405335540 is a wasteful number, since it uses less digits than its factorization.

26405335540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89472 (or 89470 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 37.

The spelling of 26405335540 in words is "twenty-six billion, four hundred five million, three hundred thirty-five thousand, five hundred forty".