5436856961 has 2 divisors, whose sum is σ = 5436856962. Its totient is φ = 5436856960.

The previous prime is 5436856949. The next prime is 5436856963. The reversal of 5436856961 is 1696586345.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5089966336 + 346890625 = 71344^2 + 18625^2 .

It is a cyclic number.

It is not a de Polignac number, because 5436856961 - 2¹⁰ = 5436855937 is a prime.

It is a super-2 number, since 2×5436856961² = 59118827228748311042, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 5436856963, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (5436856963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2718428480 + 2718428481.

It is an arithmetic number, because the mean of its divisors is an integer number (2718428481).

Almost surely, 2^5436856961 is an apocalyptic number.

It is an amenable number.

5436856961 is a deficient number, since it is larger than the sum of its proper divisors (1).

5436856961 is an equidigital number, since it uses as much as digits as its factorization.

5436856961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 53.

The square root of 5436856961 is about 73735.0456770727. The cubic root of 5436856961 is about 1758.3930926514.

The spelling of 5436856961 in words is "five billion, four hundred thirty-six million, eight hundred fifty-six thousand, nine hundred sixty-one".