49391136816 has 120 divisors (see below), whose sum is σ = 148876167744. Its totient is φ = 14068897920.

The previous prime is 49391136791. The next prime is 49391136833. The reversal of 49391136816 is 61863119394.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 746791 + ... + 810233.

Almost surely, 2^49391136816 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 49391136816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74438083872).

49391136816 is an abundant number, since it is smaller than the sum of its proper divisors (99485030928).

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

49391136816 is a wasteful number, since it uses less digits than its factorization.

49391136816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63799 (or 63786 counting only the distinct ones).

The product of its digits is 839808, while the sum is 51.

The spelling of 49391136816 in words is "forty-nine billion, three hundred ninety-one million, one hundred thirty-six thousand, eight hundred sixteen".