64161549 has 6 divisors (see below), whose sum is σ = 92677806. Its totient is φ = 42774360.

The previous prime is 64161541. The next prime is 64161551. The reversal of 64161549 is 94516146.

64161549 is a `hidden beast` number, since 641 + 6 + 1 + 5 + 4 + 9 = 666.

64161549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 59675625 + 4485924 = 7725^2 + 2118^2 .

It is not a de Polignac number, because 64161549 - 2³ = 64161541 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64161541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3564522 + ... + 3564539.

It is an arithmetic number, because the mean of its divisors is an integer number (15446301).

Almost surely, 2^64161549 is an apocalyptic number.

It is an amenable number.

64161549 is a deficient number, since it is larger than the sum of its proper divisors (28516257).

64161549 is a wasteful number, since it uses less digits than its factorization.

64161549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7129067 (or 7129064 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 64161549 is about 8010.0904489275. The cubic root of 64161549 is about 400.3362776308.

The spelling of 64161549 in words is "sixty-four million, one hundred sixty-one thousand, five hundred forty-nine".