64443734630220 has 48 divisors (see below), whose sum is σ = 196846316690688. Its totient is φ = 15622723546560.

The previous prime is 64443734630183. The next prime is 64443734630251. The reversal of 64443734630220 is 2203643734446.

It is a self number, because there is not a number n which added to its sum of digits gives 64443734630220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48821010424 + ... + 48821011743.

It is an arithmetic number, because the mean of its divisors is an integer number (4100964931056).

Almost surely, 2^{64443734630220} is an apocalyptic number.

64443734630220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64443734630220 is an abundant number, since it is smaller than the sum of its proper divisors (132402582060468).

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

64443734630220 is a wasteful number, since it uses less digits than its factorization.

64443734630220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97642022190 (or 97642022188 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 48.

The spelling of 64443734630220 in words is "sixty-four trillion, four hundred forty-three billion, seven hundred thirty-four million, six hundred thirty thousand, two hundred twenty".