61563116640361 has 8 divisors (see below), whose sum is σ = 70368291141120. Its totient is φ = 52760553027648.

The previous prime is 61563116640253. The next prime is 61563116640379. The reversal of 61563116640361 is 16304661136516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61563116640361 - 2²¹ = 61563114543209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61563116643361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 652671481 + ... + 652765798.

It is an arithmetic number, because the mean of its divisors is an integer number (8796036392640).

Almost surely, 2^{61563116640361} is an apocalyptic number.

It is an amenable number.

61563116640361 is a deficient number, since it is larger than the sum of its proper divisors (8805174500759).

61563116640361 is a wasteful number, since it uses less digits than its factorization.

61563116640361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305444023.

The product of its (nonzero) digits is 1399680, while the sum is 49.

Adding to 61563116640361 its reverse (16304661136516), we get a palindrome (77867777776877).

The spelling of 61563116640361 in words is "sixty-one trillion, five hundred sixty-three billion, one hundred sixteen million, six hundred forty thousand, three hundred sixty-one".