26563267540 has 12 divisors (see below), whose sum is σ = 55782861876. Its totient is φ = 10625307008.

The previous prime is 26563267537. The next prime is 26563267541. The reversal of 26563267540 is 4576236562.

It can be written as a sum of positive squares in 2 ways, for example, as 7004685636 + 19558581904 = 83694^2 + 139852^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26563267541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664081669 + ... + 664081708.

It is an arithmetic number, because the mean of its divisors is an integer number (4648571823).

Almost surely, 2^26563267540 is an apocalyptic number.

26563267540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26563267540 is an abundant number, since it is smaller than the sum of its proper divisors (29219594336).

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

26563267540 is a wasteful number, since it uses less digits than its factorization.

26563267540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328163386 (or 1328163384 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 46.

The spelling of 26563267540 in words is "twenty-six billion, five hundred sixty-three million, two hundred sixty-seven thousand, five hundred forty".