26206121207556 has 72 divisors (see below), whose sum is σ = 66419362376640. Its totient is φ = 8712180759744.

The previous prime is 26206121207551. The next prime is 26206121207603. The reversal of 26206121207556 is 65570212160262.

26206121207556 is a `hidden beast` number, since 2 + 6 + 2 + 0 + 612 + 1 + 20 + 7 + 5 + 5 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (26206121207551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19994166 + ... + 21264498.

It is an arithmetic number, because the mean of its divisors is an integer number (922491144120).

Almost surely, 2^{26206121207556} is an apocalyptic number.

It is an amenable number.

26206121207556 is an abundant number, since it is smaller than the sum of its proper divisors (40213241169084).

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

26206121207556 is a wasteful number, since it uses less digits than its factorization.

26206121207556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271865 (or 1271860 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 26206121207556 in words is "twenty-six trillion, two hundred six billion, one hundred twenty-one million, two hundred seven thousand, five hundred fifty-six".