63440618458 has 16 divisors (see below), whose sum is σ = 108768772224. Its totient is φ = 27185479920.

The previous prime is 63440618447. The next prime is 63440618473. The reversal of 63440618458 is 85481604436.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 160510 + ... + 390697.

It is an arithmetic number, because the mean of its divisors is an integer number (6798048264).

Almost surely, 2^63440618458 is an apocalyptic number.

63440618458 is a deficient number, since it is larger than the sum of its proper divisors (45328153766).

63440618458 is a wasteful number, since it uses less digits than its factorization.

63440618458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559437.

The product of its (nonzero) digits is 2211840, while the sum is 49.

It can be divided in two parts, 634406 and 18458, that added together give a square (652864 = 808²).

The spelling of 63440618458 in words is "sixty-three billion, four hundred forty million, six hundred eighteen thousand, four hundred fifty-eight".