2056216067881 has 4 divisors (see below), whose sum is σ = 2061943689600. Its totient is φ = 2050488446164.

The previous prime is 2056216067863. The next prime is 2056216067891. The reversal of 2056216067881 is 1887606126502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2056216067881 - 2⁵ = 2056216067849 is a prime.

It is a super-2 number, since 2×2056216067881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2056216067891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2863810321 + ... + 2863811038.

It is an arithmetic number, because the mean of its divisors is an integer number (515485922400).

Almost surely, 2^{2056216067881} is an apocalyptic number.

It is an amenable number.

2056216067881 is a deficient number, since it is larger than the sum of its proper divisors (5727621719).

2056216067881 is an equidigital number, since it uses as much as digits as its factorization.

2056216067881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5727621718.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 2056216067881 in words is "two trillion, fifty-six billion, two hundred sixteen million, sixty-seven thousand, eight hundred eighty-one".