64518847 has 2 divisors, whose sum is σ = 64518848. Its totient is φ = 64518846.

The previous prime is 64518821. The next prime is 64518899. The reversal of 64518847 is 74881546.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64518847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64518647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32259423 + 32259424.

It is an arithmetic number, because the mean of its divisors is an integer number (32259424).

Almost surely, 2^64518847 is an apocalyptic number.

64518847 is a deficient number, since it is larger than the sum of its proper divisors (1).

64518847 is an equidigital number, since it uses as much as digits as its factorization.

64518847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 215040, while the sum is 43.

The square root of 64518847 is about 8032.3624793706. The cubic root of 64518847 is about 401.0780233044.

The spelling of 64518847 in words is "sixty-four million, five hundred eighteen thousand, eight hundred forty-seven".