61544098305 has 12 divisors (see below), whose sum is σ = 106676437140. Its totient is φ = 32823519072.

The previous prime is 61544098279. The next prime is 61544098307. The reversal of 61544098305 is 50389044516.

It can be written as a sum of positive squares in 2 ways, for example, as 48440488464 + 13103609841 = 220092^2 + 114471^2 .

It is not a de Polignac number, because 61544098305 - 2²¹ = 61542001153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1367646629 = 61544098305 / (6 + 1 + 5 + 4 + 4 + 0 + 9 + 8 + 3 + 0 + 5).

It is not an unprimeable number, because it can be changed into a prime (61544098307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 683823270 + ... + 683823359.

It is an arithmetic number, because the mean of its divisors is an integer number (8889703095).

Almost surely, 2^61544098305 is an apocalyptic number.

It is an amenable number.

61544098305 is a deficient number, since it is larger than the sum of its proper divisors (45132338835).

61544098305 is a wasteful number, since it uses less digits than its factorization.

61544098305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367646640 (or 1367646637 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 61544098305 in words is "sixty-one billion, five hundred forty-four million, ninety-eight thousand, three hundred five".