64348561 has 4 divisors (see below), whose sum is σ = 64720692. Its totient is φ = 63976432.

The previous prime is 64348547. The next prime is 64348567. The reversal of 64348561 is 16584346.

It is a happy number.

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 52998400 + 11350161 = 7280^2 + 3369^2 .

It is a cyclic number.

It is not a de Polignac number, because 64348561 - 2⁷ = 64348433 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 64348561.

It is not an unprimeable number, because it can be changed into a prime (64348567) 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, 185806 + ... + 186151.

It is an arithmetic number, because the mean of its divisors is an integer number (16180173).

Almost surely, 2^64348561 is an apocalyptic number.

It is an amenable number.

64348561 is a deficient number, since it is larger than the sum of its proper divisors (372131).

64348561 is a wasteful number, since it uses less digits than its factorization.

64348561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372130.

The product of its digits is 69120, while the sum is 37.

The square root of 64348561 is about 8021.7554811899. The cubic root of 64348561 is about 400.7248544217.

The spelling of 64348561 in words is "sixty-four million, three hundred forty-eight thousand, five hundred sixty-one".