50991956885 has 8 divisors (see below), whose sum is σ = 63164230656. Its totient is φ = 39477643920.

The previous prime is 50991956879. The next prime is 50991956887. The reversal of 50991956885 is 58865919905.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-50991956885 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50991956887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164490029 + ... + 164490338.

It is an arithmetic number, because the mean of its divisors is an integer number (7895528832).

Almost surely, 2^50991956885 is an apocalyptic number.

It is an amenable number.

50991956885 is a deficient number, since it is larger than the sum of its proper divisors (12172273771).

50991956885 is a wasteful number, since it uses less digits than its factorization.

50991956885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328980403.

The product of its (nonzero) digits is 34992000, while the sum is 65.

The spelling of 50991956885 in words is "fifty billion, nine hundred ninety-one million, nine hundred fifty-six thousand, eight hundred eighty-five".