26563302440 has 16 divisors (see below), whose sum is σ = 59767430580. Its totient is φ = 10625320960.

The previous prime is 26563302433. The next prime is 26563302461. The reversal of 26563302440 is 4420336562.

It can be written as a sum of positive squares in 2 ways, for example, as 26434207396 + 129095044 = 162586^2 + 11362^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 26563302440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332041241 + ... + 332041320.

Almost surely, 2^26563302440 is an apocalyptic number.

26563302440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26563302440 is an abundant number, since it is smaller than the sum of its proper divisors (33204128140).

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

26563302440 is a wasteful number, since it uses less digits than its factorization.

26563302440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664082572 (or 664082568 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

The spelling of 26563302440 in words is "twenty-six billion, five hundred sixty-three million, three hundred two thousand, four hundred forty".