61534636697 has 2 divisors, whose sum is σ = 61534636698. Its totient is φ = 61534636696.

The previous prime is 61534636673. The next prime is 61534636727. The reversal of 61534636697 is 79663643516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41770775641 + 19763861056 = 204379^2 + 140584^2 .

It is a cyclic number.

It is not a de Polignac number, because 61534636697 - 2¹⁸ = 61534374553 is a prime.

It is not a weakly prime, because it can be changed into another prime (61534635697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30767318348 + 30767318349.

It is an arithmetic number, because the mean of its divisors is an integer number (30767318349).

Almost surely, 2^61534636697 is an apocalyptic number.

It is an amenable number.

61534636697 is a deficient number, since it is larger than the sum of its proper divisors (1).

61534636697 is an equidigital number, since it uses as much as digits as its factorization.

61534636697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14696640, while the sum is 56.

The spelling of 61534636697 in words is "sixty-one billion, five hundred thirty-four million, six hundred thirty-six thousand, six hundred ninety-seven".