65561107345 has 16 divisors (see below), whose sum is σ = 80816250240. Its totient is φ = 51029766144.

The previous prime is 65561107333. The next prime is 65561107357. The reversal of 65561107345 is 54370116556.

It is an interprime number because it is at equal distance from previous prime (65561107333) and next prime (65561107357).

It is a cyclic number.

It is not a de Polignac number, because 65561107345 - 2⁹ = 65561106833 is a prime.

It is a super-2 number, since 2×65561107345² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 538005 + ... + 648514.

It is an arithmetic number, because the mean of its divisors is an integer number (5051015640).

Almost surely, 2^65561107345 is an apocalyptic number.

It is an amenable number.

65561107345 is a deficient number, since it is larger than the sum of its proper divisors (15255142895).

65561107345 is a wasteful number, since it uses less digits than its factorization.

65561107345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186824.

The product of its (nonzero) digits is 378000, while the sum is 43.

The spelling of 65561107345 in words is "sixty-five billion, five hundred sixty-one million, one hundred seven thousand, three hundred forty-five".