64080812161 has 4 divisors (see below), whose sum is σ = 64199261524. Its totient is φ = 63962362800.

The previous prime is 64080812111. The next prime is 64080812177. The reversal of 64080812161 is 16121808046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48441809025 + 15639003136 = 220095^2 + 125056^2 .

It is a cyclic number.

It is not a de Polignac number, because 64080812161 - 2¹¹ = 64080810113 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 64080812161.

It is not an unprimeable number, because it can be changed into a prime (64080812111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59223870 + ... + 59224951.

It is an arithmetic number, because the mean of its divisors is an integer number (16049815381).

Almost surely, 2^64080812161 is an apocalyptic number.

It is an amenable number.

64080812161 is a deficient number, since it is larger than the sum of its proper divisors (118449363).

64080812161 is a wasteful number, since it uses less digits than its factorization.

64080812161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118449362.

The product of its (nonzero) digits is 18432, while the sum is 37.

The spelling of 64080812161 in words is "sixty-four billion, eighty million, eight hundred twelve thousand, one hundred sixty-one".