64144505 has 8 divisors (see below), whose sum is σ = 78278400. Its totient is φ = 50445616.

The previous prime is 64144499. The next prime is 64144511. The reversal of 64144505 is 50544146.

It is an interprime number because it is at equal distance from previous prime (64144499) and next prime (64144511).

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 64144505 - 2⁶ = 64144441 is a prime.

It is a super-2 number, since 2×64144505² = 8229035043390050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108425 + ... + 109014.

It is an arithmetic number, because the mean of its divisors is an integer number (9784800).

Almost surely, 2^64144505 is an apocalyptic number.

It is an amenable number.

64144505 is a deficient number, since it is larger than the sum of its proper divisors (14133895).

64144505 is a wasteful number, since it uses less digits than its factorization.

64144505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217503.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 64144505 is about 8009.0264701773. The cubic root of 64144505 is about 400.3008257862.

The spelling of 64144505 in words is "sixty-four million, one hundred forty-four thousand, five hundred five".