63935473980 has 48 divisors (see below), whose sum is σ = 204593518080. Its totient is φ = 14613822528.

The previous prime is 63935473919. The next prime is 63935474041. The reversal of 63935473980 is 8937453936.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (63935473919) and next prime (63935474041).

It is a self number, because there is not a number n which added to its sum of digits gives 63935473980.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76113240 + ... + 76114079.

It is an arithmetic number, because the mean of its divisors is an integer number (4262364960).

Almost surely, 2^63935473980 is an apocalyptic number.

63935473980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63935473980 is an abundant number, since it is smaller than the sum of its proper divisors (140658044100).

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

63935473980 is a wasteful number, since it uses less digits than its factorization.

63935473980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152227338 (or 152227336 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 57.

The spelling of 63935473980 in words is "sixty-three billion, nine hundred thirty-five million, four hundred seventy-three thousand, nine hundred eighty".