65561116554 has 32 divisors (see below), whose sum is σ = 145736988480. Its totient is φ = 21846862800.

The previous prime is 65561116549. The next prime is 65561116571. The reversal of 65561116554 is 45561116556.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14532 + ... + 362399.

It is an arithmetic number, because the mean of its divisors is an integer number (4554280890).

Almost surely, 2^65561116554 is an apocalyptic number.

65561116554 is an abundant number, since it is smaller than the sum of its proper divisors (80175871926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65561116554 is a wasteful number, since it uses less digits than its factorization.

65561116554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380163 (or 380157 counting only the distinct ones).

The product of its digits is 540000, while the sum is 45.

The spelling of 65561116554 in words is "sixty-five billion, five hundred sixty-one million, one hundred sixteen thousand, five hundred fifty-four".