50780865 has 16 divisors (see below), whose sum is σ = 81770688. Its totient is φ = 26909376.

The previous prime is 50780861. The next prime is 50780879. The reversal of 50780865 is 56808705.

It is a happy number.

It is not a de Polignac number, because 50780865 - 2² = 50780861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50780861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8427 + ... + 13136.

It is an arithmetic number, because the mean of its divisors is an integer number (5110668).

Almost surely, 2^50780865 is an apocalyptic number.

It is an amenable number.

50780865 is a deficient number, since it is larger than the sum of its proper divisors (30989823).

50780865 is a wasteful number, since it uses less digits than its factorization.

50780865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21728.

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 50780865 is about 7126.0693934314. The cubic root of 50780865 is about 370.3110727036.

The spelling of 50780865 in words is "fifty million, seven hundred eighty thousand, eight hundred sixty-five".