49909191680 has 176 divisors, whose sum is σ = 122143998720. Its totient is φ = 19564167168.

The previous prime is 49909191679. The next prime is 49909191707. The reversal of 49909191680 is 8619190994.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65929862 + ... + 65930618.

Almost surely, 2^49909191680 is an apocalyptic number.

49909191680 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 49909191680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61071999360).

49909191680 is an abundant number, since it is smaller than the sum of its proper divisors (72234807040).

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

49909191680 is a wasteful number, since it uses less digits than its factorization.

49909191680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 56.

The spelling of 49909191680 in words is "forty-nine billion, nine hundred nine million, one hundred ninety-one thousand, six hundred eighty".