65561126420516 has 12 divisors (see below), whose sum is σ = 114763207845132. Its totient is φ = 32771638464768.

The previous prime is 65561126420483. The next prime is 65561126420533. The reversal of 65561126420516 is 61502462116556.

It can be written as a sum of positive squares in 2 ways, for example, as 39244636818916 + 26316489601600 = 6264554^2 + 5129960^2 .

It is a super-2 number, since 2×65561126420516² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2231169845 + ... + 2231199228.

It is an arithmetic number, because the mean of its divisors is an integer number (9563600653761).

Almost surely, 2^{65561126420516} is an apocalyptic number.

It is an amenable number.

65561126420516 is a deficient number, since it is larger than the sum of its proper divisors (49202081424616).

65561126420516 is a wasteful number, since it uses less digits than its factorization.

65561126420516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4462372750 (or 4462372748 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 50.

The spelling of 65561126420516 in words is "sixty-five trillion, five hundred sixty-one billion, one hundred twenty-six million, four hundred twenty thousand, five hundred sixteen".