64888649 has 4 divisors (see below), whose sum is σ = 74158464. Its totient is φ = 55618836.

The previous prime is 64888633. The next prime is 64888651. The reversal of 64888649 is 94688846.

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 not a de Polignac number, because 64888649 - 2⁴ = 64888633 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 64888649.

It is not an unprimeable number, because it can be changed into a prime (64888669) 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, 4634897 + ... + 4634910.

It is an arithmetic number, because the mean of its divisors is an integer number (18539616).

Almost surely, 2^64888649 is an apocalyptic number.

It is an amenable number.

64888649 is a deficient number, since it is larger than the sum of its proper divisors (9269815).

64888649 is an equidigital number, since it uses as much as digits as its factorization.

64888649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9269814.

The product of its digits is 2654208, while the sum is 53.

The square root of 64888649 is about 8055.3490923733. The cubic root of 64888649 is about 401.8428488154.

The spelling of 64888649 in words is "sixty-four million, eight hundred eighty-eight thousand, six hundred forty-nine".