49985666640 has 480 divisors, whose sum is σ = 217486913280. Its totient is φ = 9991102464.

The previous prime is 49985666639. The next prime is 49985666669. The reversal of 49985666640 is 4666658994.

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 95 ways as a sum of consecutive naturals, for example, 1224804 + ... + 1264956.

It is an arithmetic number, because the mean of its divisors is an integer number (453097736).

Almost surely, 2^49985666640 is an apocalyptic number.

49985666640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49985666640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108743456640).

49985666640 is an abundant number, since it is smaller than the sum of its proper divisors (167501246640).

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

49985666640 is a wasteful number, since it uses less digits than its factorization.

49985666640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40211 (or 40202 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 63.

The spelling of 49985666640 in words is "forty-nine billion, nine hundred eighty-five million, six hundred sixty-six thousand, six hundred forty".