36651585661 has 2 divisors, whose sum is σ = 36651585662. Its totient is φ = 36651585660.

The previous prime is 36651585653. The next prime is 36651585679. The reversal of 36651585661 is 16658515663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24867397636 + 11784188025 = 157694^2 + 108555^2 .

It is a cyclic number.

It is not a de Polignac number, because 36651585661 - 2³ = 36651585653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 36651585599 and 36651585608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36651585631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18325792830 + 18325792831.

It is an arithmetic number, because the mean of its divisors is an integer number (18325792831).

Almost surely, 2^36651585661 is an apocalyptic number.

It is an amenable number.

36651585661 is a deficient number, since it is larger than the sum of its proper divisors (1).

36651585661 is an equidigital number, since it uses as much as digits as its factorization.

36651585661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888000, while the sum is 52.

The spelling of 36651585661 in words is "thirty-six billion, six hundred fifty-one million, five hundred eighty-five thousand, six hundred sixty-one".