63785528478 has 96 divisors (see below), whose sum is σ = 163516354560. Its totient is φ = 17582564160.

The previous prime is 63785528473. The next prime is 63785528479. The reversal of 63785528478 is 87482558736.

63785528478 is a `hidden beast` number, since 6 + 3 + 7 + 8 + 552 + 8 + 4 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63785528473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5369101 + ... + 5380967.

It is an arithmetic number, because the mean of its divisors is an integer number (1703295360).

Almost surely, 2^63785528478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63785528478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81758177280).

63785528478 is an abundant number, since it is smaller than the sum of its proper divisors (99730826082).

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

63785528478 is a wasteful number, since it uses less digits than its factorization.

63785528478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13382 (or 13379 counting only the distinct ones).

The product of its digits is 90316800, while the sum is 63.

The spelling of 63785528478 in words is "sixty-three billion, seven hundred eighty-five million, five hundred twenty-eight thousand, four hundred seventy-eight".