64518401 has 2 divisors, whose sum is σ = 64518402. Its totient is φ = 64518400.

The previous prime is 64518397. The next prime is 64518407. The reversal of 64518401 is 10481546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36966400 + 27552001 = 6080^2 + 5249^2 .

It is a cyclic number.

It is not a de Polignac number, because 64518401 - 2² = 64518397 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64518407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32259200 + 32259201.

It is an arithmetic number, because the mean of its divisors is an integer number (32259201).

Almost surely, 2^64518401 is an apocalyptic number.

It is an amenable number.

64518401 is a deficient number, since it is larger than the sum of its proper divisors (1).

64518401 is an equidigital number, since it uses as much as digits as its factorization.

64518401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 64518401 is about 8032.3347166313. The cubic root of 64518401 is about 401.0770991237.

Adding to 64518401 its reverse (10481546), we get a palindrome (74999947).

The spelling of 64518401 in words is "sixty-four million, five hundred eighteen thousand, four hundred one".