49999951800 has 144 divisors (see below), whose sum is σ = 167983489440. Its totient is φ = 13328002560.

The previous prime is 49999951789. The next prime is 49999951823. The reversal of 49999951800 is 815999994.

49999951800 is a `hidden beast` number, since 499 + 9 + 99 + 51 + 8 + 0 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6895777 + ... + 6903023.

It is an arithmetic number, because the mean of its divisors is an integer number (1166552010).

Almost surely, 2^49999951800 is an apocalyptic number.

49999951800 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 49999951800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83991744720).

49999951800 is an abundant number, since it is smaller than the sum of its proper divisors (117983537640).

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

49999951800 is a wasteful number, since it uses less digits than its factorization.

49999951800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11102 (or 11090 counting only the distinct ones).

The product of its (nonzero) digits is 9447840, while the sum is 63.

The spelling of 49999951800 in words is "forty-nine billion, nine hundred ninety-nine million, nine hundred fifty-one thousand, eight hundred".