61345382369 has 2 divisors, whose sum is σ = 61345382370. Its totient is φ = 61345382368.

The previous prime is 61345382341. The next prime is 61345382437. The reversal of 61345382369 is 96328354316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60608531344 + 736851025 = 246188^2 + 27145^2 .

It is a cyclic number.

It is not a de Polignac number, because 61345382369 - 2¹² = 61345378273 is a prime.

It is a super-2 number, since 2×61345382369² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61345382309) 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, 30672691184 + 30672691185.

It is an arithmetic number, because the mean of its divisors is an integer number (30672691185).

Almost surely, 2^61345382369 is an apocalyptic number.

It is an amenable number.

61345382369 is a deficient number, since it is larger than the sum of its proper divisors (1).

61345382369 is an equidigital number, since it uses as much as digits as its factorization.

61345382369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 50.

The spelling of 61345382369 in words is "sixty-one billion, three hundred forty-five million, three hundred eighty-two thousand, three hundred sixty-nine".