63551601520 has 160 divisors (see below), whose sum is σ = 163705950720. Its totient is φ = 22751646720.

The previous prime is 63551601493. The next prime is 63551601521. The reversal of 63551601520 is 2510615536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63551601521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16222602 + ... + 16226518.

It is an arithmetic number, because the mean of its divisors is an integer number (1023162192).

Almost surely, 2^63551601520 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 63551601520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81852975360).

63551601520 is an abundant number, since it is smaller than the sum of its proper divisors (100154349200).

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

63551601520 is a wasteful number, since it uses less digits than its factorization.

63551601520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4223 (or 4217 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 63551601520 in words is "sixty-three billion, five hundred fifty-one million, six hundred one thousand, five hundred twenty".