64256369 has 4 divisors (see below), whose sum is σ = 65345520. Its totient is φ = 63167220.

The previous prime is 64256351. The next prime is 64256371. The reversal of 64256369 is 96365246.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96365246 = 2 ⋅48182623.

It is a cyclic number.

It is not a de Polignac number, because 64256369 - 2⁸ = 64256113 is a prime.

It is a super-2 number, since 2×64256369² = 8257761914128322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64252369) 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, 544487 + ... + 544604.

It is an arithmetic number, because the mean of its divisors is an integer number (16336380).

Almost surely, 2^64256369 is an apocalyptic number.

It is an amenable number.

64256369 is a deficient number, since it is larger than the sum of its proper divisors (1089151).

64256369 is a wasteful number, since it uses less digits than its factorization.

64256369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089150.

The product of its digits is 233280, while the sum is 41.

The square root of 64256369 is about 8016.0070484001. The cubic root of 64256369 is about 400.5333905036.

The spelling of 64256369 in words is "sixty-four million, two hundred fifty-six thousand, three hundred sixty-nine".