61543504462609 has 8 divisors (see below), whose sum is σ = 66321834768000. Its totient is φ = 56771490525456.

The previous prime is 61543504462579. The next prime is 61543504462663. The reversal of 61543504462609 is 90626440534516.

It is a happy number.

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 61543504462609 - 2¹¹ = 61543504460561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61543504462609.

It is not an unprimeable number, because it can be changed into a prime (61543504462669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1579071817 + ... + 1579110790.

It is an arithmetic number, because the mean of its divisors is an integer number (8290229346000).

Almost surely, 2^{61543504462609} is an apocalyptic number.

It is an amenable number.

61543504462609 is a deficient number, since it is larger than the sum of its proper divisors (4778330305391).

61543504462609 is a wasteful number, since it uses less digits than its factorization.

61543504462609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158184119.

The product of its (nonzero) digits is 18662400, while the sum is 55.

The spelling of 61543504462609 in words is "sixty-one trillion, five hundred forty-three billion, five hundred four million, four hundred sixty-two thousand, six hundred nine".