11777656213 has 4 divisors (see below), whose sum is σ = 11801840800. Its totient is φ = 11753471628.

The previous prime is 11777656201. The next prime is 11777656223. The reversal of 11777656213 is 31265677711.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31265677711 = 92801 ⋅336911.

It is a cyclic number.

It is not a de Polignac number, because 11777656213 - 2⁵ = 11777656181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11777656223) 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, 12091563 + ... + 12092536.

It is an arithmetic number, because the mean of its divisors is an integer number (2950460200).

Almost surely, 2^11777656213 is an apocalyptic number.

It is an amenable number.

11777656213 is a deficient number, since it is larger than the sum of its proper divisors (24184587).

11777656213 is an equidigital number, since it uses as much as digits as its factorization.

11777656213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24184586.

The product of its digits is 370440, while the sum is 46.

The spelling of 11777656213 in words is "eleven billion, seven hundred seventy-seven million, six hundred fifty-six thousand, two hundred thirteen".