63545353520 has 160 divisors (see below), whose sum is σ = 162462101760. Its totient is φ = 22923648000.

The previous prime is 63545353447. The next prime is 63545353537. The reversal of 63545353520 is 2535354536.

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 31 ways as a sum of consecutive naturals, for example, 78353915 + ... + 78354725.

It is an arithmetic number, because the mean of its divisors is an integer number (1015388136).

Almost surely, 2^63545353520 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 63545353520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81231050880).

63545353520 is an abundant number, since it is smaller than the sum of its proper divisors (98916748240).

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

63545353520 is a wasteful number, since it uses less digits than its factorization.

63545353520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435 (or 1429 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 41.

The spelling of 63545353520 in words is "sixty-three billion, five hundred forty-five million, three hundred fifty-three thousand, five hundred twenty".