64486481 has 4 divisors (see below), whose sum is σ = 66059364. Its totient is φ = 62913600.

The previous prime is 64486447. The next prime is 64486489. The reversal of 64486481 is 18468446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18468446 = 2 ⋅9234223.

It can be written as a sum of positive squares in 2 ways, for example, as 9859600 + 54626881 = 3140^2 + 7391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64486481 is a prime.

It is a super-2 number, since 2×64486481² = 8317012463526722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 1572841 = 64486481 / (6 + 4 + 4 + 8 + 6 + 4 + 8 + 1).

It is not an unprimeable number, because it can be changed into a prime (64486489) 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, 786380 + ... + 786461.

It is an arithmetic number, because the mean of its divisors is an integer number (16514841).

Almost surely, 2^64486481 is an apocalyptic number.

It is an amenable number.

64486481 is a deficient number, since it is larger than the sum of its proper divisors (1572883).

64486481 is a wasteful number, since it uses less digits than its factorization.

64486481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572882.

The product of its digits is 147456, while the sum is 41.

The square root of 64486481 is about 8030.3475018208. The cubic root of 64486481 is about 401.0109449068.

The spelling of 64486481 in words is "sixty-four million, four hundred eighty-six thousand, four hundred eighty-one".