26531262263540 has 24 divisors (see below), whose sum is σ = 55738933616520. Its totient is φ = 10608070074368.

The previous prime is 26531262263531. The next prime is 26531262263557. The reversal of 26531262263540 is 4536226213562.

It can be written as a sum of positive squares in 4 ways, for example, as 3796122276496 + 22735139987044 = 1948364^2 + 4768138^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277127885 + ... + 277223604.

It is an arithmetic number, because the mean of its divisors is an integer number (2322455567355).

Almost surely, 2^{26531262263540} is an apocalyptic number.

26531262263540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26531262263540 is an abundant number, since it is smaller than the sum of its proper divisors (29207671352980).

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

26531262263540 is a wasteful number, since it uses less digits than its factorization.

26531262263540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554353891 (or 554353889 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 47.

The spelling of 26531262263540 in words is "twenty-six trillion, five hundred thirty-one billion, two hundred sixty-two million, two hundred sixty-three thousand, five hundred forty".