26469778550 has 24 divisors (see below), whose sum is σ = 49238879016. Its totient is φ = 10586816640.

The previous prime is 26469778547. The next prime is 26469778571. The reversal of 26469778550 is 5587796462.

It is a self number, because there is not a number n which added to its sum of digits gives 26469778550.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 606254 + ... + 648446.

It is an arithmetic number, because the mean of its divisors is an integer number (2051619959).

Almost surely, 2^26469778550 is an apocalyptic number.

26469778550 is a deficient number, since it is larger than the sum of its proper divisors (22769100466).

26469778550 is a wasteful number, since it uses less digits than its factorization.

26469778550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54752 (or 54747 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 59.

The spelling of 26469778550 in words is "twenty-six billion, four hundred sixty-nine million, seven hundred seventy-eight thousand, five hundred fifty".