50991808627 has 4 divisors (see below), whose sum is σ = 51023151256. Its totient is φ = 50960466000.

The previous prime is 50991808607. The next prime is 50991808631. The reversal of 50991808627 is 72680819905.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50991808627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50991808607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15668874 + ... + 15672127.

It is an arithmetic number, because the mean of its divisors is an integer number (12755787814).

Almost surely, 2^50991808627 is an apocalyptic number.

50991808627 is a deficient number, since it is larger than the sum of its proper divisors (31342629).

50991808627 is a wasteful number, since it uses less digits than its factorization.

50991808627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31342628.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 50991808627 in words is "fifty billion, nine hundred ninety-one million, eight hundred eight thousand, six hundred twenty-seven".