61513603265287 has 2 divisors, whose sum is σ = 61513603265288. Its totient is φ = 61513603265286.

The previous prime is 61513603265251. The next prime is 61513603265339. The reversal of 61513603265287 is 78256230631516.

61513603265287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61513603265287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61513603265227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30756801632643 + 30756801632644.

It is an arithmetic number, because the mean of its divisors is an integer number (30756801632644).

Almost surely, 2^{61513603265287} is an apocalyptic number.

61513603265287 is a deficient number, since it is larger than the sum of its proper divisors (1).

61513603265287 is an equidigital number, since it uses as much as digits as its factorization.

61513603265287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 61513603265287 in words is "sixty-one trillion, five hundred thirteen billion, six hundred three million, two hundred sixty-five thousand, two hundred eighty-seven".