61005150515665 has 16 divisors (see below), whose sum is σ = 74140751450880. Its totient is φ = 48181205030400.

The previous prime is 61005150515653. The next prime is 61005150515669. The reversal of 61005150515665 is 56651505150016.

It is a happy number.

It is not a de Polignac number, because 61005150515665 - 2¹⁷ = 61005150384593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61005150515669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4531311 + ... + 11939140.

It is an arithmetic number, because the mean of its divisors is an integer number (4633796965680).

Almost surely, 2^{61005150515665} is an apocalyptic number.

It is an amenable number.

61005150515665 is a deficient number, since it is larger than the sum of its proper divisors (13135600935215).

61005150515665 is a wasteful number, since it uses less digits than its factorization.

61005150515665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16479912.

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 61005150515665 in words is "sixty-one trillion, five billion, one hundred fifty million, five hundred fifteen thousand, six hundred sixty-five".