64143457 has 16 divisors (see below), whose sum is σ = 74736000. Its totient is φ = 53919360.

The previous prime is 64143427. The next prime is 64143467. The reversal of 64143457 is 75434146.

It is a cyclic number.

It is not a de Polignac number, because 64143457 - 2¹¹ = 64141409 is a prime.

It is a super-2 number, since 2×64143457² = 8228766151821698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64143407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92482 + ... + 93172.

It is an arithmetic number, because the mean of its divisors is an integer number (4671000).

Almost surely, 2^64143457 is an apocalyptic number.

It is an amenable number.

64143457 is a deficient number, since it is larger than the sum of its proper divisors (10592543).

64143457 is a wasteful number, since it uses less digits than its factorization.

64143457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936.

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

The square root of 64143457 is about 8008.9610437310. The cubic root of 64143457 is about 400.2986457213.

The spelling of 64143457 in words is "sixty-four million, one hundred forty-three thousand, four hundred fifty-seven".