26181436550 has 48 divisors (see below), whose sum is σ = 48893998560. Its totient is φ = 10430415360.

The previous prime is 26181436537. The next prime is 26181436559. The reversal of 26181436550 is 5563418162.

It is a junction number, because it is equal to n+sod(n) for n = 26181436498 and 26181436507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26181436559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20185502 + ... + 20186798.

It is an arithmetic number, because the mean of its divisors is an integer number (1018624970).

Almost surely, 2^26181436550 is an apocalyptic number.

26181436550 is a deficient number, since it is larger than the sum of its proper divisors (22712562010).

26181436550 is a wasteful number, since it uses less digits than its factorization.

26181436550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625 (or 2620 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 26181436550 in words is "twenty-six billion, one hundred eighty-one million, four hundred thirty-six thousand, five hundred fifty".