36551767661 has 2 divisors, whose sum is σ = 36551767662. Its totient is φ = 36551767660.

The previous prime is 36551767639. The next prime is 36551767717. The reversal of 36551767661 is 16676715563.

36551767661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36483292036 + 68475625 = 191006^2 + 8275^2 .

It is an emirp because it is prime and its reverse (16676715563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36551767661 - 2⁶ = 36551767597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36551767561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18275883830 + 18275883831.

It is an arithmetic number, because the mean of its divisors is an integer number (18275883831).

Almost surely, 2^36551767661 is an apocalyptic number.

It is an amenable number.

36551767661 is a deficient number, since it is larger than the sum of its proper divisors (1).

36551767661 is an equidigital number, since it uses as much as digits as its factorization.

36551767661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4762800, while the sum is 53.

The spelling of 36551767661 in words is "thirty-six billion, five hundred fifty-one million, seven hundred sixty-seven thousand, six hundred sixty-one".