6361561537 has 2 divisors, whose sum is σ = 6361561538. Its totient is φ = 6361561536.

The previous prime is 6361561523. The next prime is 6361561579. The reversal of 6361561537 is 7351651636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6289124416 + 72437121 = 79304^2 + 8511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6361561537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6361561493 and 6361561502.

It is not a weakly prime, because it can be changed into another prime (6361564537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3180780768 + 3180780769.

It is an arithmetic number, because the mean of its divisors is an integer number (3180780769).

Almost surely, 2^6361561537 is an apocalyptic number.

It is an amenable number.

6361561537 is a deficient number, since it is larger than the sum of its proper divisors (1).

6361561537 is an equidigital number, since it uses as much as digits as its factorization.

6361561537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 43.

The square root of 6361561537 is about 79759.3977973756. The cubic root of 6361561537 is about 1852.9110766586.

Subtracting 6361561537 from its reverse (7351651636), we obtain a palindrome (990090099).

The spelling of 6361561537 in words is "six billion, three hundred sixty-one million, five hundred sixty-one thousand, five hundred thirty-seven".