63491354784 has 144 divisors (see below), whose sum is σ = 212118981984. Its totient is φ = 17759808000.

The previous prime is 63491354749. The next prime is 63491354803. The reversal of 63491354784 is 48745319436.

63491354784 is a `hidden beast` number, since 6 + 3 + 4 + 9 + 13 + 547 + 84 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 63491354784.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 729642 + ... + 812009.

It is an arithmetic number, because the mean of its divisors is an integer number (1473048486).

Almost surely, 2^63491354784 is an apocalyptic number.

It is an amenable number.

63491354784 is an abundant number, since it is smaller than the sum of its proper divisors (148627627200).

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

63491354784 is a wasteful number, since it uses less digits than its factorization.

63491354784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541691 (or 1541680 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 63491354784 in words is "sixty-three billion, four hundred ninety-one million, three hundred fifty-four thousand, seven hundred eighty-four".