61513603265363 has 2 divisors, whose sum is σ = 61513603265364. Its totient is φ = 61513603265362.

The previous prime is 61513603265339. The next prime is 61513603265369. The reversal of 61513603265363 is 36356230631516.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61513603265363 - 2²² = 61513599071059 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (61513603265369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30756801632681 + 30756801632682.

It is an arithmetic number, because the mean of its divisors is an integer number (30756801632682).

Almost surely, 2^{61513603265363} is an apocalyptic number.

61513603265363 is a deficient number, since it is larger than the sum of its proper divisors (1).

61513603265363 is an equidigital number, since it uses as much as digits as its factorization.

61513603265363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5248800, while the sum is 50.

Adding to 61513603265363 its reverse (36356230631516), we get a palindrome (97869833896879).

The spelling of 61513603265363 in words is "sixty-one trillion, five hundred thirteen billion, six hundred three million, two hundred sixty-five thousand, three hundred sixty-three".