63394981628 has 48 divisors (see below), whose sum is σ = 122307010560. Its totient is φ = 28749783920.

The previous prime is 63394981613. The next prime is 63394981631. The reversal of 63394981628 is 82618949336.

It is a super-2 number, since 2×63394981628² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2345093 + ... + 2371971.

It is an arithmetic number, because the mean of its divisors is an integer number (2548062720).

Almost surely, 2^63394981628 is an apocalyptic number.

It is an amenable number.

63394981628 is a deficient number, since it is larger than the sum of its proper divisors (58912028932).

63394981628 is a wasteful number, since it uses less digits than its factorization.

63394981628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27359 (or 27335 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 59.

The spelling of 63394981628 in words is "sixty-three billion, three hundred ninety-four million, nine hundred eighty-one thousand, six hundred twenty-eight".