64045919 has 8 divisors (see below), whose sum is σ = 77501088. Its totient is φ = 51667200.

The previous prime is 64045909. The next prime is 64045931. The reversal of 64045919 is 91954046.

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 64045919 - 2¹² = 64041823 is a prime.

It is a super-2 number, since 2×64045919² = 8203759481109122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64045909) 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, 268982 + ... + 269219.

It is an arithmetic number, because the mean of its divisors is an integer number (9687636).

Almost surely, 2^64045919 is an apocalyptic number.

64045919 is a deficient number, since it is larger than the sum of its proper divisors (13455169).

64045919 is a wasteful number, since it uses less digits than its factorization.

64045919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538225.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 64045919 is about 8002.8694229008. The cubic root of 64045919 is about 400.0956417132.

The spelling of 64045919 in words is "sixty-four million, forty-five thousand, nine hundred nineteen".