26500155012 has 18 divisors (see below), whose sum is σ = 66986503038. Its totient is φ = 8833384992.

The previous prime is 26500155001. The next prime is 26500155013. The reversal of 26500155012 is 21055100562.

26500155012 is a `hidden beast` number, since 2 + 6 + 500 + 155 + 0 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16033637376 + 10466517636 = 126624^2 + 102306^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (26500155013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 368057673 + ... + 368057744.

It is an arithmetic number, because the mean of its divisors is an integer number (3721472391).

Almost surely, 2^26500155012 is an apocalyptic number.

It is an amenable number.

26500155012 is an abundant number, since it is smaller than the sum of its proper divisors (40486348026).

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

26500155012 is a wasteful number, since it uses less digits than its factorization.

26500155012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736115427 (or 736115422 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 26500155012 its reverse (21055100562), we get a palindrome (47555255574).

The spelling of 26500155012 in words is "twenty-six billion, five hundred million, one hundred fifty-five thousand, twelve".