61330828563517 has 2 divisors, whose sum is σ = 61330828563518. Its totient is φ = 61330828563516.

The previous prime is 61330828563509. The next prime is 61330828563619. The reversal of 61330828563517 is 71536582803316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48877171070841 + 12453657492676 = 6991221^2 + 3528974^2 .

It is a cyclic number.

It is not a de Polignac number, because 61330828563517 - 2³ = 61330828563509 is a prime.

It is a super-2 number, since 2×61330828563517² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61330828563317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30665414281758 + 30665414281759.

It is an arithmetic number, because the mean of its divisors is an integer number (30665414281759).

Almost surely, 2^{61330828563517} is an apocalyptic number.

It is an amenable number.

61330828563517 is a deficient number, since it is larger than the sum of its proper divisors (1).

61330828563517 is an equidigital number, since it uses as much as digits as its factorization.

61330828563517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21772800, while the sum is 58.

The spelling of 61330828563517 in words is "sixty-one trillion, three hundred thirty billion, eight hundred twenty-eight million, five hundred sixty-three thousand, five hundred seventeen".