64546234512 has 80 divisors (see below), whose sum is σ = 169555641792. Its totient is φ = 21153000960.

The previous prime is 64546234499. The next prime is 64546234517. The reversal of 64546234512 is 21543264546.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (64546234517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9328078 + ... + 9334994.

Almost surely, 2^64546234512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64546234512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84777820896).

64546234512 is an abundant number, since it is smaller than the sum of its proper divisors (105009407280).

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

64546234512 is a wasteful number, since it uses less digits than its factorization.

64546234512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10176 (or 10170 counting only the distinct ones).

The product of its digits is 691200, while the sum is 42.

The spelling of 64546234512 in words is "sixty-four billion, five hundred forty-six million, two hundred thirty-four thousand, five hundred twelve".