63881064542 has 16 divisors (see below), whose sum is σ = 97909162560. Its totient is φ = 31245355008.

The previous prime is 63881064517. The next prime is 63881064557. The reversal of 63881064542 is 24546018836.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21134 + ... + 358062.

It is an arithmetic number, because the mean of its divisors is an integer number (6119322660).

Almost surely, 2^63881064542 is an apocalyptic number.

63881064542 is a deficient number, since it is larger than the sum of its proper divisors (34028098018).

63881064542 is a wasteful number, since it uses less digits than its factorization.

63881064542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338995.

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 63881064542 in words is "sixty-three billion, eight hundred eighty-one million, sixty-four thousand, five hundred forty-two".