64144357 has 4 divisors (see below), whose sum is σ = 64190016. Its totient is φ = 64098700.

The previous prime is 64144343. The next prime is 64144397. The reversal of 64144357 is 75344146.

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 a cyclic number.

It is not a de Polignac number, because 64144357 - 2¹⁵ = 64111589 is a prime.

It is a super-2 number, since 2×64144357² = 8228997069886898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64144397) 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, 20653 + ... + 23554.

It is an arithmetic number, because the mean of its divisors is an integer number (16047504).

Almost surely, 2^64144357 is an apocalyptic number.

It is an amenable number.

64144357 is a deficient number, since it is larger than the sum of its proper divisors (45659).

64144357 is a wasteful number, since it uses less digits than its factorization.

64144357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45658.

The product of its digits is 40320, while the sum is 34.

The square root of 64144357 is about 8009.0172305970. The cubic root of 64144357 is about 400.3005179159.

The spelling of 64144357 in words is "sixty-four million, one hundred forty-four thousand, three hundred fifty-seven".