11777622881 has 4 divisors (see below), whose sum is σ = 11778538500. Its totient is φ = 11776707264.

The previous prime is 11777622869. The next prime is 11777622911. The reversal of 11777622881 is 18822677711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18822677711 = 4621 ⋅4073291.

It can be written as a sum of positive squares in 2 ways, for example, as 7913881600 + 3863741281 = 88960^2 + 62159^2 .

It is a cyclic number.

It is not a de Polignac number, because 11777622881 - 2⁶ = 11777622817 is a prime.

It is a super-2 number, since 2×11777622881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11777622841) 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 3 ways as a sum of consecutive naturals, for example, 438236 + ... + 464333.

It is an arithmetic number, because the mean of its divisors is an integer number (2944634625).

Almost surely, 2^11777622881 is an apocalyptic number.

It is an amenable number.

11777622881 is a deficient number, since it is larger than the sum of its proper divisors (915619).

11777622881 is an equidigital number, since it uses as much as digits as its factorization.

11777622881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915618.

The product of its digits is 526848, while the sum is 50.

The spelling of 11777622881 in words is "eleven billion, seven hundred seventy-seven million, six hundred twenty-two thousand, eight hundred eighty-one".