550643015520 has 1152 divisors, whose sum is σ = 2192454770688. Its totient is φ = 129591705600.

The previous prime is 550643015501. The next prime is 550643015581. The reversal of 550643015520 is 25510346055.

550643015520 is a `hidden beast` number, since 5 + 5 + 0 + 643 + 0 + 1 + 5 + 5 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1770556165 + ... + 1770556475.

It is an arithmetic number, because the mean of its divisors is an integer number (1903172544).

Almost surely, 2^550643015520 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 550643015520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1096227385344).

550643015520 is an abundant number, since it is smaller than the sum of its proper divisors (1641811755168).

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

550643015520 is a wasteful number, since it uses less digits than its factorization.

550643015520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 550643015520 in words is "five hundred fifty billion, six hundred forty-three million, fifteen thousand, five hundred twenty".