49988689920 has 1120 divisors, whose sum is σ = 206480846880. Its totient is φ = 11466178560.

The previous prime is 49988689913. The next prime is 49988689921. The reversal of 49988689920 is 2998688994.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49988689921) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 819486690 + ... + 819486750.

It is an arithmetic number, because the mean of its divisors is an integer number (184357899).

Almost surely, 2^49988689920 is an apocalyptic number.

49988689920 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 49988689920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103240423440).

49988689920 is an abundant number, since it is smaller than the sum of its proper divisors (156492156960).

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

49988689920 is a wasteful number, since it uses less digits than its factorization.

49988689920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 161243136, while the sum is 72.

The spelling of 49988689920 in words is "forty-nine billion, nine hundred eighty-eight million, six hundred eighty-nine thousand, nine hundred twenty".