64494361 has 4 divisors (see below), whose sum is σ = 64634724. Its totient is φ = 64354000.

The previous prime is 64494349. The next prime is 64494371. The reversal of 64494361 is 16349446.

64494361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 49787136 + 14707225 = 7056^2 + 3835^2 .

It is a cyclic number.

It is not a de Polignac number, because 64494361 - 2⁵ = 64494329 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 64494361.

It is not an unprimeable number, because it can be changed into a prime (64494301) 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 3 ways as a sum of consecutive naturals, for example, 69490 + ... + 70411.

It is an arithmetic number, because the mean of its divisors is an integer number (16158681).

Almost surely, 2^64494361 is an apocalyptic number.

64494361 is the 3592-nd centered decagonal number.

It is an amenable number.

64494361 is a deficient number, since it is larger than the sum of its proper divisors (140363).

64494361 is a wasteful number, since it uses less digits than its factorization.

64494361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140362.

The product of its digits is 62208, while the sum is 37.

The square root of 64494361 is about 8030.8381256255. The cubic root of 64494361 is about 401.0272782400.

The spelling of 64494361 in words is "sixty-four million, four hundred ninety-four thousand, three hundred sixty-one".