63408476256 has 384 divisors, whose sum is σ = 196617093120. Its totient is φ = 17744044032.

The previous prime is 63408476203. The next prime is 63408476269. The reversal of 63408476256 is 65267480436.

It is a happy number.

It is a super-2 number, since 2×63408476256² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 63408476199 and 63408476208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47782665 + ... + 47783991.

It is an arithmetic number, because the mean of its divisors is an integer number (512023680).

Almost surely, 2^63408476256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63408476256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98308546560).

63408476256 is an abundant number, since it is smaller than the sum of its proper divisors (133208616864).

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

63408476256 is a wasteful number, since it uses less digits than its factorization.

63408476256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466 (or 1458 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 51.

The spelling of 63408476256 in words is "sixty-three billion, four hundred eight million, four hundred seventy-six thousand, two hundred fifty-six".