26261393553 has 12 divisors (see below), whose sum is σ = 37938912180. Its totient is φ = 17504924256.

The previous prime is 26261393549. The next prime is 26261393563. The reversal of 26261393553 is 35539316262.

It is a happy number.

26261393553 is a `hidden beast` number, since 2 + 6 + 2 + 6 + 1 + 3 + 93 + 553 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12202074369 + 14059319184 = 110463^2 + 118572^2 .

It is not a de Polignac number, because 26261393553 - 2² = 26261393549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26261393499 and 26261393508.

It is not an unprimeable number, because it can be changed into a prime (26261393563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159418 + ... + 279171.

It is an arithmetic number, because the mean of its divisors is an integer number (3161576015).

Almost surely, 2^26261393553 is an apocalyptic number.

It is an amenable number.

26261393553 is a deficient number, since it is larger than the sum of its proper divisors (11677518627).

26261393553 is a wasteful number, since it uses less digits than its factorization.

26261393553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445248 (or 445245 counting only the distinct ones).

The product of its digits is 874800, while the sum is 45.

The spelling of 26261393553 in words is "twenty-six billion, two hundred sixty-one million, three hundred ninety-three thousand, five hundred fifty-three".