64545393 has 12 divisors (see below), whose sum is σ = 94595984. Its totient is φ = 39118200.

The previous prime is 64545389. The next prime is 64545409. The reversal of 64545393 is 39354546.

It is not a de Polignac number, because 64545393 - 2² = 64545389 is a prime.

It is a super-2 number, since 2×64545393² = 8332215515048898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64545323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88543 + ... + 89268.

Almost surely, 2^64545393 is an apocalyptic number.

It is an amenable number.

64545393 is a deficient number, since it is larger than the sum of its proper divisors (30050591).

64545393 is a wasteful number, since it uses less digits than its factorization.

64545393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177836 (or 177825 counting only the distinct ones).

The product of its digits is 194400, while the sum is 39.

The square root of 64545393 is about 8034.0147497998. The cubic root of 64545393 is about 401.1330230335.

It can be divided in two parts, 645453 and 93, that added together give a palindrome (645546).

The spelling of 64545393 in words is "sixty-four million, five hundred forty-five thousand, three hundred ninety-three".