50509665 has 12 divisors (see below), whose sum is σ = 87550164. Its totient is φ = 26938464.

The previous prime is 50509639. The next prime is 50509687. The reversal of 50509665 is 56690505.

50509665 is a `hidden beast` number, since 505 + 0 + 96 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19607184 + 30902481 = 4428^2 + 5559^2 .

It is not a de Polignac number, because 50509665 - 2⁸ = 50509409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 561174 + ... + 561263.

It is an arithmetic number, because the mean of its divisors is an integer number (7295847).

Almost surely, 2^50509665 is an apocalyptic number.

It is an amenable number.

50509665 is a deficient number, since it is larger than the sum of its proper divisors (37040499).

50509665 is a wasteful number, since it uses less digits than its factorization.

50509665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122448 (or 1122445 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The square root of 50509665 is about 7107.0151962691. The cubic root of 50509665 is about 369.6506685820.

The spelling of 50509665 in words is "fifty million, five hundred nine thousand, six hundred sixty-five".