11777856281 has 16 divisors (see below), whose sum is σ = 12100562880. Its totient is φ = 11460579840.

The previous prime is 11777856253. The next prime is 11777856341. The reversal of 11777856281 is 18265877711.

11777856281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11777856281 - 2¹⁸ = 11777594137 is a prime.

It is a super-2 number, since 2×11777856281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11777856221) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1650401 + ... + 1657521.

It is an arithmetic number, because the mean of its divisors is an integer number (756285180).

Almost surely, 2^11777856281 is an apocalyptic number.

It is an amenable number.

11777856281 is a deficient number, since it is larger than the sum of its proper divisors (322706599).

11777856281 is a wasteful number, since it uses less digits than its factorization.

11777856281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7496.

The product of its digits is 1317120, while the sum is 53.

The spelling of 11777856281 in words is "eleven billion, seven hundred seventy-seven million, eight hundred fifty-six thousand, two hundred eighty-one".