61361064518 has 48 divisors (see below), whose sum is σ = 103943742336. Its totient is φ = 27123932160.

The previous prime is 61361064517. The next prime is 61361064521. The reversal of 61361064518 is 81546016316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61361064517) 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 23 ways as a sum of consecutive naturals, for example, 986180 + ... + 1046552.

It is an arithmetic number, because the mean of its divisors is an integer number (2165494632).

Almost surely, 2^61361064518 is an apocalyptic number.

61361064518 is a deficient number, since it is larger than the sum of its proper divisors (42582677818).

61361064518 is a wasteful number, since it uses less digits than its factorization.

61361064518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60529 (or 60516 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 61361064518 in words is "sixty-one billion, three hundred sixty-one million, sixty-four thousand, five hundred eighteen".