64143556 has 12 divisors (see below), whose sum is σ = 112901292. Its totient is φ = 31886048.

The previous prime is 64143553. The next prime is 64143577. The reversal of 64143556 is 65534146.

It can be written as a sum of positive squares in 2 ways, for example, as 32604100 + 31539456 = 5710^2 + 5616^2 .

It is a super-2 number, since 2×64143556² = 8228791552650272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64143551) 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 3 ways as a sum of consecutive naturals, for example, 45655 + ... + 47038.

It is an arithmetic number, because the mean of its divisors is an integer number (9408441).

Almost surely, 2^64143556 is an apocalyptic number.

It is an amenable number.

64143556 is a deficient number, since it is larger than the sum of its proper divisors (48757736).

64143556 is a wasteful number, since it uses less digits than its factorization.

64143556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92870 (or 92868 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 64143556 is about 8008.9672243055. The cubic root of 64143556 is about 400.2988516636.

The spelling of 64143556 in words is "sixty-four million, one hundred forty-three thousand, five hundred fifty-six".