61541652866681 has 16 divisors (see below), whose sum is σ = 66513564391680. Its totient is φ = 56603755152000.

The previous prime is 61541652866669. The next prime is 61541652866717. The reversal of 61541652866681 is 18666825614516.

It is a cyclic number.

It is not a de Polignac number, because 61541652866681 - 2¹⁴ = 61541652850297 is a prime.

It is a super-2 number, since 2×61541652866681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61541652866611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66087056 + ... + 67011806.

It is an arithmetic number, because the mean of its divisors is an integer number (4157097774480).

Almost surely, 2^{61541652866681} is an apocalyptic number.

It is an amenable number.

61541652866681 is a deficient number, since it is larger than the sum of its proper divisors (4971911524999).

61541652866681 is a wasteful number, since it uses less digits than its factorization.

61541652866681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943136.

The product of its digits is 99532800, while the sum is 65.

The spelling of 61541652866681 in words is "sixty-one trillion, five hundred forty-one billion, six hundred fifty-two million, eight hundred sixty-six thousand, six hundred eighty-one".