61633717025 has 6 divisors (see below), whose sum is σ = 76425809142. Its totient is φ = 49306973600.

The previous prime is 61633716953. The next prime is 61633717063. The reversal of 61633717025 is 52071733616.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 11962234384 + 49671482641 = 109372^2 + 222871^2 .

It is not a de Polignac number, because 61633717025 - 2⁸ = 61633716769 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1232674316 + ... + 1232674365.

It is an arithmetic number, because the mean of its divisors is an integer number (12737634857).

Almost surely, 2^61633717025 is an apocalyptic number.

It is an amenable number.

61633717025 is a deficient number, since it is larger than the sum of its proper divisors (14792092117).

61633717025 is a wasteful number, since it uses less digits than its factorization.

61633717025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465348691 (or 2465348686 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 41.

The spelling of 61633717025 in words is "sixty-one billion, six hundred thirty-three million, seven hundred seventeen thousand, twenty-five".