6889985550 has 432 divisors, whose sum is σ = 22784291712. Its totient is φ = 1543147200.

The previous prime is 6889985549. The next prime is 6889985587. The reversal of 6889985550 is 555899886.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 42269769 + ... + 42269931.

It is an arithmetic number, because the mean of its divisors is an integer number (52741416).

Almost surely, 2^6889985550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6889985550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11392145856).

6889985550 is an abundant number, since it is smaller than the sum of its proper divisors (15894306162).

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

6889985550 is a wasteful number, since it uses less digits than its factorization.

6889985550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 63.

The square root of 6889985550 is about 83005.9368358673. The cubic root of 6889985550 is about 1902.8567874099.

It can be divided in two parts, 68899 and 85550, that added together give a square (154449 = 393²).

The spelling of 6889985550 in words is "six billion, eight hundred eighty-nine million, nine hundred eighty-five thousand, five hundred fifty".