64494161 has 4 divisors (see below), whose sum is σ = 64512000. Its totient is φ = 64476324.

The previous prime is 64494149. The next prime is 64494169. The reversal of 64494161 is 16149446.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16149446 = 2 ⋅8074723.

It is a cyclic number.

It is not a de Polignac number, because 64494161 - 2⁶ = 64494097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64494169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1361 + ... + 11438.

It is an arithmetic number, because the mean of its divisors is an integer number (16128000).

Almost surely, 2^64494161 is an apocalyptic number.

It is an amenable number.

64494161 is a deficient number, since it is larger than the sum of its proper divisors (17839).

64494161 is a wasteful number, since it uses less digits than its factorization.

64494161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17838.

The product of its digits is 20736, while the sum is 35.

The square root of 64494161 is about 8030.8256736154. The cubic root of 64494161 is about 401.0268637049.

The spelling of 64494161 in words is "sixty-four million, four hundred ninety-four thousand, one hundred sixty-one".