11777815241 has 2 divisors, whose sum is σ = 11777815242. Its totient is φ = 11777815240.

The previous prime is 11777815223. The next prime is 11777815243. The reversal of 11777815241 is 14251877711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7060872841 + 4716942400 = 84029^2 + 68680^2 .

It is a cyclic number.

It is not a de Polignac number, because 11777815241 - 2³⁰ = 10704073417 is a prime.

It is a super-2 number, since 2×11777815241² (a number of 21 digits) contains 22 as substring.

Together with 11777815243, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11777815192 and 11777815201.

It is not a weakly prime, because it can be changed into another prime (11777815243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5888907620 + 5888907621.

It is an arithmetic number, because the mean of its divisors is an integer number (5888907621).

Almost surely, 2^11777815241 is an apocalyptic number.

It is an amenable number.

11777815241 is a deficient number, since it is larger than the sum of its proper divisors (1).

11777815241 is an equidigital number, since it uses as much as digits as its factorization.

11777815241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109760, while the sum is 44.

The spelling of 11777815241 in words is "eleven billion, seven hundred seventy-seven million, eight hundred fifteen thousand, two hundred forty-one".