55583663520 has 432 divisors, whose sum is σ = 223885003104. Its totient is φ = 11549260800.

The previous prime is 55583663507. The next prime is 55583663521. The reversal of 55583663520 is 2536638555.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 55583663520.

It is not an unprimeable number, because it can be changed into a prime (55583663521) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2836155 + ... + 2855685.

It is an arithmetic number, because the mean of its divisors is an integer number (518252322).

Almost surely, 2^55583663520 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 55583663520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111942501552).

55583663520 is an abundant number, since it is smaller than the sum of its proper divisors (168301339584).

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

55583663520 is a wasteful number, since it uses less digits than its factorization.

55583663520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19585 (or 19559 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 48.

The spelling of 55583663520 in words is "fifty-five billion, five hundred eighty-three million, six hundred sixty-three thousand, five hundred twenty".