50209272781 has 4 divisors (see below), whose sum is σ = 50340367872. Its totient is φ = 50078177692.

The previous prime is 50209272709. The next prime is 50209272787. The reversal of 50209272781 is 18727290205.

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 50209272781 - 2²⁹ = 49672401869 is a prime.

It is a super-2 number, since 2×50209272781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50209272787) 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, 65546971 + ... + 65547736.

It is an arithmetic number, because the mean of its divisors is an integer number (12585091968).

Almost surely, 2^50209272781 is an apocalyptic number.

It is an amenable number.

50209272781 is a deficient number, since it is larger than the sum of its proper divisors (131095091).

50209272781 is a wasteful number, since it uses less digits than its factorization.

50209272781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131095090.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 50209272781 in words is "fifty billion, two hundred nine million, two hundred seventy-two thousand, seven hundred eighty-one".