63121877280 has 576 divisors, whose sum is σ = 271211286528. Its totient is φ = 12986542080.

The previous prime is 63121877279. The next prime is 63121877297. The reversal of 63121877280 is 8277812136.

63121877280 is a `hidden beast` number, since 631 + 2 + 1 + 8 + 7 + 7 + 2 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11417877 + ... + 11423403.

It is an arithmetic number, because the mean of its divisors is an integer number (470852928).

Almost surely, 2^63121877280 is an apocalyptic number.

63121877280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63121877280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135605643264).

63121877280 is an abundant number, since it is smaller than the sum of its proper divisors (208089409248).

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

63121877280 is a wasteful number, since it uses less digits than its factorization.

63121877280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5669 (or 5658 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 63121877280 in words is "sixty-three billion, one hundred twenty-one million, eight hundred seventy-seven thousand, two hundred eighty".