64618313 has 4 divisors (see below), whose sum is σ = 64650768. Its totient is φ = 64585860.

The previous prime is 64618303. The next prime is 64618321. The reversal of 64618313 is 31381646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64618313 - 2¹² = 64614217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64618313.

It is not an unprimeable number, because it can be changed into a prime (64618303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13031 + ... + 17292.

It is an arithmetic number, because the mean of its divisors is an integer number (16162692).

Almost surely, 2^64618313 is an apocalyptic number.

It is an amenable number.

64618313 is a deficient number, since it is larger than the sum of its proper divisors (32455).

64618313 is a wasteful number, since it uses less digits than its factorization.

64618313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32454.

The product of its digits is 10368, while the sum is 32.

The square root of 64618313 is about 8038.5516730317. The cubic root of 64618313 is about 401.2840258668.

Adding to 64618313 its reverse (31381646), we get a palindrome (95999959).

The spelling of 64618313 in words is "sixty-four million, six hundred eighteen thousand, three hundred thirteen".