26315909550 has 72 divisors (see below), whose sum is σ = 80802383376. Its totient is φ = 6015064320.

The previous prime is 26315909531. The next prime is 26315909561. The reversal of 26315909550 is 5590951362.

26315909550 is a `hidden beast` number, since 2 + 6 + 3 + 1 + 5 + 90 + 9 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 26315909496 and 26315909505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4173979 + ... + 4180278.

Almost surely, 2^26315909550 is an apocalyptic number.

26315909550 is an abundant number, since it is smaller than the sum of its proper divisors (54486473826).

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

26315909550 is a wasteful number, since it uses less digits than its factorization.

26315909550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8354282 (or 8354274 counting only the distinct ones).

The product of its (nonzero) digits is 364500, while the sum is 45.

The spelling of 26315909550 in words is "twenty-six billion, three hundred fifteen million, nine hundred nine thousand, five hundred fifty".