64885919 has 8 divisors (see below), whose sum is σ = 74920608. Its totient is φ = 55042560.

The previous prime is 64885879. The next prime is 64885927. The reversal of 64885919 is 91958846.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64885919 - 2¹² = 64881823 is a prime.

It is a super-2 number, since 2×64885919² = 8420364968949122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64885979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47102 + ... + 48459.

It is an arithmetic number, because the mean of its divisors is an integer number (9365076).

Almost surely, 2^64885919 is an apocalyptic number.

64885919 is a deficient number, since it is larger than the sum of its proper divisors (10034689).

64885919 is an equidigital number, since it uses as much as digits as its factorization.

64885919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95665.

The product of its digits is 622080, while the sum is 50.

The square root of 64885919 is about 8055.1796379721. The cubic root of 64885919 is about 401.8372132825.

The spelling of 64885919 in words is "sixty-four million, eight hundred eighty-five thousand, nine hundred nineteen".