61220336603 has 2 divisors, whose sum is σ = 61220336604. Its totient is φ = 61220336602.

The previous prime is 61220336599. The next prime is 61220336621. The reversal of 61220336603 is 30663302216.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61220336603 - 2² = 61220336599 is a prime.

It is a super-2 number, since 2×61220336603² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61220336603.

It is not a weakly prime, because it can be changed into another prime (61220332603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30610168301 + 30610168302.

It is an arithmetic number, because the mean of its divisors is an integer number (30610168302).

Almost surely, 2^61220336603 is an apocalyptic number.

61220336603 is a deficient number, since it is larger than the sum of its proper divisors (1).

61220336603 is an equidigital number, since it uses as much as digits as its factorization.

61220336603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 32.

Adding to 61220336603 its reverse (30663302216), we get a palindrome (91883638819).

The spelling of 61220336603 in words is "sixty-one billion, two hundred twenty million, three hundred thirty-six thousand, six hundred three".