63407897280 has 1344 divisors, whose sum is σ = 288082085760. Its totient is φ = 13005619200.

The previous prime is 63407897251. The next prime is 63407897291. The reversal of 63407897280 is 8279870436.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a super-2 number, since 2×63407897280² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 191 ways as a sum of consecutive naturals, for example, 225650740 + ... + 225651020.

It is an arithmetic number, because the mean of its divisors is an integer number (214346790).

Almost surely, 2^63407897280 is an apocalyptic number.

63407897280 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 63407897280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144041042880).

63407897280 is an abundant number, since it is smaller than the sum of its proper divisors (224674188480).

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

63407897280 is a wasteful number, since it uses less digits than its factorization.

63407897280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 63407897280 in words is "sixty-three billion, four hundred seven million, eight hundred ninety-seven thousand, two hundred eighty".