550562578398 has 96 divisors (see below), whose sum is σ = 1381628252160. Its totient is φ = 155191645440.

The previous prime is 550562578387. The next prime is 550562578427. The reversal of 550562578398 is 893875265055.

550562578398 is a `hidden beast` number, since 5 + 5 + 0 + 56 + 2 + 578 + 3 + 9 + 8 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13188118 + ... + 13229798.

It is an arithmetic number, because the mean of its divisors is an integer number (14391960960).

Almost surely, 2^550562578398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550562578398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (690814126080).

550562578398 is an abundant number, since it is smaller than the sum of its proper divisors (831065673762).

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

550562578398 is a wasteful number, since it uses less digits than its factorization.

550562578398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43102 (or 43099 counting only the distinct ones).

The product of its (nonzero) digits is 90720000, while the sum is 63.

The spelling of 550562578398 in words is "five hundred fifty billion, five hundred sixty-two million, five hundred seventy-eight thousand, three hundred ninety-eight".