64556 has 6 divisors (see below), whose sum is σ = 112980. Its totient is φ = 32276.

The previous prime is 64553. The next prime is 64567. The reversal of 64556 is 65546.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (64553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8066 + ... + 8073.

It is an arithmetic number, because the mean of its divisors is an integer number (18830).

2⁶⁴⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

64556 is a deficient number, since it is larger than the sum of its proper divisors (48424).

64556 is a wasteful number, since it uses less digits than its factorization.

64556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16143 (or 16141 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 64556 is about 254.0787279565. The cubic root of 64556 is about 40.1154995089.

Subtracting 64556 from its reverse (65546), we obtain a triangular number (990 = T₄₄).

The spelling of 64556 in words is "sixty-four thousand, five hundred fifty-six".