61598716795225 has 27 divisors (see below), whose sum is σ = 76737368554623. Its totient is φ = 49051022037840.

The previous prime is 61598716795211. The next prime is 61598716795229. The reversal of 61598716795225 is 52259761789516.

The square root of 61598716795225 is 7848485.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 22175538046281 + 39423178748944 = 4709091^2 + 6278788^2 .

It is a de Polignac number, because none of the positive numbers 2^k-61598716795225 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61598716795229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 8751057256 + ... + 8751064294.

Almost surely, 2^{61598716795225} is an apocalyptic number.

61598716795225 is the 7848485-th square number.

61598716795225 is the 3924243-rd centered octagonal number.

It is an amenable number.

61598716795225 is a deficient number, since it is larger than the sum of its proper divisors (15138651759398).

61598716795225 is an frugal number, since it uses more digits than its factorization.

61598716795225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14534 (or 7267 counting only the distinct ones).

The product of its digits is 571536000, while the sum is 73.

The spelling of 61598716795225 in words is "sixty-one trillion, five hundred ninety-eight billion, seven hundred sixteen million, seven hundred ninety-five thousand, two hundred twenty-five".