26005136556 has 24 divisors (see below), whose sum is σ = 69347031040. Its totient is φ = 7430038992.

The previous prime is 26005136533. The next prime is 26005136557. The reversal of 26005136556 is 65563150062.

It is a super-2 number, since 2×26005136556² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26005136557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154792396 + ... + 154792563.

Almost surely, 2^26005136556 is an apocalyptic number.

It is an amenable number.

26005136556 is an abundant number, since it is smaller than the sum of its proper divisors (43341894484).

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

26005136556 is a wasteful number, since it uses less digits than its factorization.

26005136556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309584973 (or 309584971 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 39.

The spelling of 26005136556 in words is "twenty-six billion, five million, one hundred thirty-six thousand, five hundred fifty-six".