61565334512 has 40 divisors (see below), whose sum is σ = 130159608240. Its totient is φ = 27977172480.

The previous prime is 61565334511. The next prime is 61565334517. The reversal of 61565334512 is 21543356516.

It is a self number, because there is not a number n which added to its sum of digits gives 61565334512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61565334511) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 688814 + ... + 773042.

It is an arithmetic number, because the mean of its divisors is an integer number (3253990206).

Almost surely, 2^61565334512 is an apocalyptic number.

It is an amenable number.

61565334512 is an abundant number, since it is smaller than the sum of its proper divisors (68594273728).

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

61565334512 is a wasteful number, since it uses less digits than its factorization.

61565334512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88401 (or 88395 counting only the distinct ones).

The product of its digits is 324000, while the sum is 41.

The spelling of 61565334512 in words is "sixty-one billion, five hundred sixty-five million, three hundred thirty-four thousand, five hundred twelve".