61123636393 has 2 divisors, whose sum is σ = 61123636394. Its totient is φ = 61123636392.

The previous prime is 61123636373. The next prime is 61123636403. The reversal of 61123636393 is 39363632116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37470119184 + 23653517209 = 193572^2 + 153797^2 .

It is a cyclic number.

It is not a de Polignac number, because 61123636393 - 2¹³ = 61123628201 is a prime.

It is not a weakly prime, because it can be changed into another prime (61123636373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30561818196 + 30561818197.

It is an arithmetic number, because the mean of its divisors is an integer number (30561818197).

Almost surely, 2^61123636393 is an apocalyptic number.

It is an amenable number.

61123636393 is a deficient number, since it is larger than the sum of its proper divisors (1).

61123636393 is an equidigital number, since it uses as much as digits as its factorization.

61123636393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 43.

The spelling of 61123636393 in words is "sixty-one billion, one hundred twenty-three million, six hundred thirty-six thousand, three hundred ninety-three".