64493577 has 10 divisors (see below), whose sum is σ = 96342378. Its totient is φ = 42995664.

The previous prime is 64493567. The next prime is 64493579. The reversal of 64493577 is 77539446.

It can be written as a sum of positive squares in only one way, i.e., 47279376 + 17214201 = 6876^2 + 4149^2 .

It is not a de Polignac number, because 64493577 - 2¹⁹ = 63969289 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64493579) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 398028 + ... + 398189.

Almost surely, 2^64493577 is an apocalyptic number.

It is an amenable number.

64493577 is a deficient number, since it is larger than the sum of its proper divisors (31848801).

64493577 is an equidigital number, since it uses as much as digits as its factorization.

64493577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796229 (or 796220 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 64493577 is about 8030.7893136354. The cubic root of 64493577 is about 401.0256532573.

The spelling of 64493577 in words is "sixty-four million, four hundred ninety-three thousand, five hundred seventy-seven".