63146639820 has 48 divisors (see below), whose sum is σ = 192884283648. Its totient is φ = 15308276160.

The previous prime is 63146639807. The next prime is 63146639861. The reversal of 63146639820 is 2893664136.

It is a self number, because there is not a number n which added to its sum of digits gives 63146639820.

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, 47837704 + ... + 47839023.

It is an arithmetic number, because the mean of its divisors is an integer number (4018422576).

Almost surely, 2^63146639820 is an apocalyptic number.

63146639820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63146639820 is an abundant number, since it is smaller than the sum of its proper divisors (129737643828).

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

63146639820 is a wasteful number, since it uses less digits than its factorization.

63146639820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95676750 (or 95676748 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 48.

The spelling of 63146639820 in words is "sixty-three billion, one hundred forty-six million, six hundred thirty-nine thousand, eight hundred twenty".