64425491 has 8 divisors (see below), whose sum is σ = 69635664. Its totient is φ = 59251680.

The previous prime is 64425467. The next prime is 64425497. The reversal of 64425491 is 19452446.

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 64425491 - 2¹⁰ = 64424467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64425497) 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, 5345 + ... + 12546.

It is an arithmetic number, because the mean of its divisors is an integer number (8704458).

Almost surely, 2^64425491 is an apocalyptic number.

64425491 is a deficient number, since it is larger than the sum of its proper divisors (5210173).

64425491 is a wasteful number, since it uses less digits than its factorization.

64425491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18181.

The product of its digits is 34560, while the sum is 35.

The square root of 64425491 is about 8026.5491339678. The cubic root of 64425491 is about 400.8844823691.

The spelling of 64425491 in words is "sixty-four million, four hundred twenty-five thousand, four hundred ninety-one".