50491329980 has 576 divisors, whose sum is σ = 148195418112. Its totient is φ = 14041589760.

The previous prime is 50491329851. The next prime is 50491329989. The reversal of 50491329980 is 8992319405.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50491329989) by changing a digit.

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 191 ways as a sum of consecutive naturals, for example, 753601907 + ... + 753601973.

It is an arithmetic number, because the mean of its divisors is an integer number (257283712).

Almost surely, 2^50491329980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50491329980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74097709056).

50491329980 is an abundant number, since it is smaller than the sum of its proper divisors (97704088132).

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

50491329980 is a wasteful number, since it uses less digits than its factorization.

50491329980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 50491329980 in words is "fifty billion, four hundred ninety-one million, three hundred twenty-nine thousand, nine hundred eighty".