50161795681 has 4 divisors (see below), whose sum is σ = 50796755200. Its totient is φ = 49526836164.

The previous prime is 50161795679. The next prime is 50161795687. The reversal of 50161795681 is 18659716105.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50161795681 - 2¹ = 50161795679 is a prime.

It is a super-2 number, since 2×50161795681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50161795687) 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, 317479641 + ... + 317479798.

It is an arithmetic number, because the mean of its divisors is an integer number (12699188800).

Almost surely, 2^50161795681 is an apocalyptic number.

It is an amenable number.

50161795681 is a deficient number, since it is larger than the sum of its proper divisors (634959519).

50161795681 is an equidigital number, since it uses as much as digits as its factorization.

50161795681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634959518.

The product of its (nonzero) digits is 453600, while the sum is 49.

The spelling of 50161795681 in words is "fifty billion, one hundred sixty-one million, seven hundred ninety-five thousand, six hundred eighty-one".