50893657921 has 4 divisors (see below), whose sum is σ = 51727980244. Its totient is φ = 50059335600.

The previous prime is 50893657891. The next prime is 50893657961. The reversal of 50893657921 is 12975639805.

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 430977600 + 50462680321 = 20760^2 + 224639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50893657921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50893657961) 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, 417161070 + ... + 417161191.

It is an arithmetic number, because the mean of its divisors is an integer number (12931995061).

Almost surely, 2^50893657921 is an apocalyptic number.

It is an amenable number.

50893657921 is a deficient number, since it is larger than the sum of its proper divisors (834322323).

50893657921 is an equidigital number, since it uses as much as digits as its factorization.

50893657921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834322322.

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 50893657921 in words is "fifty billion, eight hundred ninety-three million, six hundred fifty-seven thousand, nine hundred twenty-one".