61365123641 has 2 divisors, whose sum is σ = 61365123642. Its totient is φ = 61365123640.

The previous prime is 61365123559. The next prime is 61365123671. The reversal of 61365123641 is 14632156316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48486278416 + 12878845225 = 220196^2 + 113485^2 .

It is a cyclic number.

It is not a de Polignac number, because 61365123641 - 2¹⁴ = 61365107257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61365123595 and 61365123604.

It is not a weakly prime, because it can be changed into another prime (61365123671) 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, 30682561820 + 30682561821.

It is an arithmetic number, because the mean of its divisors is an integer number (30682561821).

Almost surely, 2^61365123641 is an apocalyptic number.

It is an amenable number.

61365123641 is a deficient number, since it is larger than the sum of its proper divisors (1).

61365123641 is an equidigital number, since it uses as much as digits as its factorization.

61365123641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 38.

Adding to 61365123641 its reverse (14632156316), we get a palindrome (75997279957).

The spelling of 61365123641 in words is "sixty-one billion, three hundred sixty-five million, one hundred twenty-three thousand, six hundred forty-one".