61064461066521 has 16 divisors (see below), whose sum is σ = 89700450464448. Its totient is φ = 36642340872000.

The previous prime is 61064461066487. The next prime is 61064461066547. The reversal of 61064461066521 is 12566016446016.

It is not a de Polignac number, because 61064461066521 - 2⁶ = 61064461066457 is a prime.

It is a super-3 number, since 3×61064461066521³ (a number of 42 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (61064461066561) 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, 9160581886 + ... + 9160588551.

It is an arithmetic number, because the mean of its divisors is an integer number (5606278154028).

Almost surely, 2^{61064461066521} is an apocalyptic number.

It is an amenable number.

61064461066521 is a deficient number, since it is larger than the sum of its proper divisors (28635989397927).

61064461066521 is a wasteful number, since it uses less digits than its factorization.

61064461066521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18321170552.

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 61064461066521 in words is "sixty-one trillion, sixty-four billion, four hundred sixty-one million, sixty-six thousand, five hundred twenty-one".