50128075449 has 15 divisors (see below), whose sum is σ = 74885690847. Its totient is φ = 33417373608.

The previous prime is 50128075409. The next prime is 50128075531. The reversal of 50128075449 is 94457082105.

The square root of 50128075449 is 223893.

It is a perfect power (a square), and thus also a powerful number.

50128075449 is a `hidden beast` number, since 50 + 12 + 80 + 75 + 449 = 666.

It can be written as a sum of positive squares in only one way, i.e., 100701225 + 50027374224 = 10035^2 + 223668^2 .

It is not a de Polignac number, because 50128075449 - 2¹⁹ = 50127551161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50128075409) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2002599 + ... + 2027475.

Almost surely, 2^50128075449 is an apocalyptic number.

50128075449 is the 223893-rd square number.

50128075449 is the 111947-th centered octagonal number.

It is an amenable number.

50128075449 is a deficient number, since it is larger than the sum of its proper divisors (24757615398).

50128075449 is an frugal number, since it uses more digits than its factorization.

50128075449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49766 (or 24880 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 50128075449 in words is "fifty billion, one hundred twenty-eight million, seventy-five thousand, four hundred forty-nine".