50138256437 has 4 divisors (see below), whose sum is σ = 50138867916. Its totient is φ = 50137644960.

The previous prime is 50138256431. The next prime is 50138256473. The reversal of 50138256437 is 73465283105.

50138256437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73465283105 = 5 ⋅14693056621.

It can be written as a sum of positive squares in 2 ways, for example, as 23203210276 + 26935046161 = 152326^2 + 164119^2 .

It is a cyclic number.

It is not a de Polignac number, because 50138256437 - 2¹² = 50138252341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50138256431) 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, 159398 + ... + 354519.

It is an arithmetic number, because the mean of its divisors is an integer number (12534716979).

Almost surely, 2^50138256437 is an apocalyptic number.

It is an amenable number.

50138256437 is a deficient number, since it is larger than the sum of its proper divisors (611479).

50138256437 is an equidigital number, since it uses as much as digits as its factorization.

50138256437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611478.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 50138256437 in words is "fifty billion, one hundred thirty-eight million, two hundred fifty-six thousand, four hundred thirty-seven".