50391843637 has 4 divisors (see below), whose sum is σ = 51620913036. Its totient is φ = 49162774240.

The previous prime is 50391843613. The next prime is 50391843653. The reversal of 50391843637 is 73634819305.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5224542961 + 45167300676 = 72281^2 + 212526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50391843637 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50391844637) 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, 614534638 + ... + 614534719.

It is an arithmetic number, because the mean of its divisors is an integer number (12905228259).

Almost surely, 2^50391843637 is an apocalyptic number.

It is an amenable number.

50391843637 is a deficient number, since it is larger than the sum of its proper divisors (1229069399).

50391843637 is a wasteful number, since it uses less digits than its factorization.

50391843637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229069398.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 50391843637 in words is "fifty billion, three hundred ninety-one million, eight hundred forty-three thousand, six hundred thirty-seven".