64546220 has 24 divisors (see below), whose sum is σ = 135718800. Its totient is φ = 25785792.

The previous prime is 64546219. The next prime is 64546231. The reversal of 64546220 is 2264546.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19871 + ... + 22889.

It is an arithmetic number, because the mean of its divisors is an integer number (5654950).

Almost surely, 2^64546220 is an apocalyptic number.

It is an amenable number.

64546220 is an abundant number, since it is smaller than the sum of its proper divisors (71172580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64546220 is a wasteful number, since it uses less digits than its factorization.

64546220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097 (or 4095 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 64546220 is about 8034.0662182982. The cubic root of 64546220 is about 401.1347362236.

The spelling of 64546220 in words is "sixty-four million, five hundred forty-six thousand, two hundred twenty".