55965811 has 16 divisors (see below), whose sum is σ = 64540800. Its totient is φ = 47995200.

The previous prime is 55965809. The next prime is 55965829. The reversal of 55965811 is 11856955.

It is not a de Polignac number, because 55965811 - 2¹ = 55965809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55965011) 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, 68775 + ... + 69583.

It is an arithmetic number, because the mean of its divisors is an integer number (4033800).

Almost surely, 2^55965811 is an apocalyptic number.

55965811 is a deficient number, since it is larger than the sum of its proper divisors (8574989).

55965811 is a wasteful number, since it uses less digits than its factorization.

55965811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170.

The product of its digits is 54000, while the sum is 40.

The square root of 55965811 is about 7481.0300761326. The cubic root of 55965811 is about 382.5083621280.

The spelling of 55965811 in words is "fifty-five million, nine hundred sixty-five thousand, eight hundred eleven".