61542317065025 has 6 divisors (see below), whose sum is σ = 76312473160662. Its totient is φ = 49233853652000.

The previous prime is 61542317064983. The next prime is 61542317065027. The reversal of 61542317065025 is 52056071324516.

It can be written as a sum of positive squares in 3 ways, for example, as 5504860907536 + 56037456157489 = 2346244^2 + 7485817^2 .

It is not a de Polignac number, because 61542317065025 - 2¹⁸ = 61542316802881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61542317065027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1230846341276 + ... + 1230846341325.

It is an arithmetic number, because the mean of its divisors is an integer number (12718745526777).

Almost surely, 2^{61542317065025} is an apocalyptic number.

It is an amenable number.

61542317065025 is a deficient number, since it is larger than the sum of its proper divisors (14770156095637).

61542317065025 is a wasteful number, since it uses less digits than its factorization.

61542317065025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461692682611 (or 2461692682606 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 47.

The spelling of 61542317065025 in words is "sixty-one trillion, five hundred forty-two billion, three hundred seventeen million, sixty-five thousand, twenty-five".