64632253543 has 16 divisors (see below), whose sum is σ = 75939226272. Its totient is φ = 54231408000.

The previous prime is 64632253523. The next prime is 64632253579. The reversal of 64632253543 is 34535223646.

It is not a de Polignac number, because 64632253543 - 2¹³ = 64632245351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64632253543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64632253523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2092633 + ... + 2123293.

It is an arithmetic number, because the mean of its divisors is an integer number (4746201642).

Almost surely, 2^64632253543 is an apocalyptic number.

64632253543 is a deficient number, since it is larger than the sum of its proper divisors (11306972729).

64632253543 is a wasteful number, since it uses less digits than its factorization.

64632253543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45426.

The product of its digits is 1555200, while the sum is 43.

The spelling of 64632253543 in words is "sixty-four billion, six hundred thirty-two million, two hundred fifty-three thousand, five hundred forty-three".