63812849920 has 36 divisors (see below), whose sum is σ = 152851720140. Its totient is φ = 25525139456.

The previous prime is 63812849897. The next prime is 63812849927. The reversal of 63812849920 is 2994821836.

It can be written as a sum of positive squares in 2 ways, for example, as 25308991744 + 38503858176 = 159088^2 + 196224^2 .

It is not an unprimeable number, because it can be changed into a prime (63812849927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24925615 + ... + 24928174.

It is an arithmetic number, because the mean of its divisors is an integer number (4245881115).

Almost surely, 2^63812849920 is an apocalyptic number.

It is an amenable number.

63812849920 is an abundant number, since it is smaller than the sum of its proper divisors (89038870220).

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

63812849920 is an equidigital number, since it uses as much as digits as its factorization.

63812849920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49853810 (or 49853796 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 63812849920 in words is "sixty-three billion, eight hundred twelve million, eight hundred forty-nine thousand, nine hundred twenty".