26778752876556 has 36 divisors (see below), whose sum is σ = 68800420647504. Its totient is φ = 8779918975200.

The previous prime is 26778752876549. The next prime is 26778752876587. The reversal of 26778752876556 is 65567825787762.

26778752876556 is a `hidden beast` number, since 2 + 6 + 7 + 7 + 8 + 7 + 52 + 8 + 7 + 6 + 556 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×26778752876556² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6097163760 + ... + 6097168151.

It is an arithmetic number, because the mean of its divisors is an integer number (1911122795764).

Almost surely, 2^{26778752876556} is an apocalyptic number.

It is an amenable number.

26778752876556 is an abundant number, since it is smaller than the sum of its proper divisors (42021667770948).

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

26778752876556 is a wasteful number, since it uses less digits than its factorization.

26778752876556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12194331982 (or 12194331977 counting only the distinct ones).

The product of its digits is 16595712000, while the sum is 81.

The spelling of 26778752876556 in words is "twenty-six trillion, seven hundred seventy-eight billion, seven hundred fifty-two million, eight hundred seventy-six thousand, five hundred fifty-six".