64441257 has 8 divisors (see below), whose sum is σ = 85958784. Its totient is φ = 42942288.

The previous prime is 64441243. The next prime is 64441297. The reversal of 64441257 is 75214446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64441257 - 2¹² = 64437161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64441297) 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, 10983 + ... + 15795.

It is an arithmetic number, because the mean of its divisors is an integer number (10744848).

Almost surely, 2^64441257 is an apocalyptic number.

It is an amenable number.

64441257 is a deficient number, since it is larger than the sum of its proper divisors (21517527).

64441257 is a wasteful number, since it uses less digits than its factorization.

64441257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9279.

The product of its digits is 26880, while the sum is 33.

The square root of 64441257 is about 8027.5311896000. The cubic root of 64441257 is about 400.9171807579.

The spelling of 64441257 in words is "sixty-four million, four hundred forty-one thousand, two hundred fifty-seven".