36551767561 has 2 divisors, whose sum is σ = 36551767562. Its totient is φ = 36551767560.

The previous prime is 36551767559. The next prime is 36551767583. The reversal of 36551767561 is 16576715563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24482547961 + 12069219600 = 156469^2 + 109860^2 .

It is a cyclic number.

It is not a de Polignac number, because 36551767561 - 2¹ = 36551767559 is a prime.

Together with 36551767559, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 36551767499 and 36551767508.

It is not a weakly prime, because it can be changed into another prime (36551767531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18275883780 + 18275883781.

It is an arithmetic number, because the mean of its divisors is an integer number (18275883781).

Almost surely, 2^36551767561 is an apocalyptic number.

It is an amenable number.

36551767561 is a deficient number, since it is larger than the sum of its proper divisors (1).

36551767561 is an equidigital number, since it uses as much as digits as its factorization.

36551767561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3969000, while the sum is 52.

The spelling of 36551767561 in words is "thirty-six billion, five hundred fifty-one million, seven hundred sixty-seven thousand, five hundred sixty-one".