64518701 has 4 divisors (see below), whose sum is σ = 69481692. Its totient is φ = 59555712.

The previous prime is 64518691. The next prime is 64518709. The reversal of 64518701 is 10781546.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10781546 = 2 ⋅5390773.

It can be written as a sum of positive squares in 2 ways, for example, as 25755625 + 38763076 = 5075^2 + 6226^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64518701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64518709) 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, 2481476 + ... + 2481501.

It is an arithmetic number, because the mean of its divisors is an integer number (17370423).

Almost surely, 2^64518701 is an apocalyptic number.

It is an amenable number.

64518701 is a deficient number, since it is larger than the sum of its proper divisors (4962991).

64518701 is a wasteful number, since it uses less digits than its factorization.

64518701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4962990.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 64518701 is about 8032.3533911301. The cubic root of 64518701 is about 401.0777207704.

The spelling of 64518701 in words is "sixty-four million, five hundred eighteen thousand, seven hundred one".