64516537 has 2 divisors, whose sum is σ = 64516538. Its totient is φ = 64516536.

The previous prime is 64516531. The next prime is 64516577. The reversal of 64516537 is 73561546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57699216 + 6817321 = 7596^2 + 2611^2 .

It is a cyclic number.

It is not a de Polignac number, because 64516537 - 2⁷ = 64516409 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64516496 and 64516505.

It is not a weakly prime, because it can be changed into another prime (64516531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32258268 + 32258269.

It is an arithmetic number, because the mean of its divisors is an integer number (32258269).

Almost surely, 2^64516537 is an apocalyptic number.

It is an amenable number.

64516537 is a deficient number, since it is larger than the sum of its proper divisors (1).

64516537 is an equidigital number, since it uses as much as digits as its factorization.

64516537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 37.

The square root of 64516537 is about 8032.2186847720. The cubic root of 64516537 is about 401.0732365827.

The spelling of 64516537 in words is "sixty-four million, five hundred sixteen thousand, five hundred thirty-seven".