64543444434546 has 64 divisors (see below), whose sum is σ = 160950747617280. Its totient is φ = 16763359167360.

The previous prime is 64543444434509. The next prime is 64543444434571.

64543444434546 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×64543444434546² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64543444434546.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1743510 + ... + 11494638.

It is an arithmetic number, because the mean of its divisors is an integer number (2514855431520).

Almost surely, 2^{64543444434546} is an apocalyptic number.

64543444434546 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

64543444434546 is an abundant number, since it is smaller than the sum of its proper divisors (96407303182734).

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

64543444434546 is a wasteful number, since it uses less digits than its factorization.

64543444434546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9765479.

The product of its digits is 530841600, while the sum is 60.

The spelling of 64543444434546 in words is "sixty-four trillion, five hundred forty-three billion, four hundred forty-four million, four hundred thirty-four thousand, five hundred forty-six".