55709811 has 12 divisors (see below), whose sum is σ = 82341688. Its totient is φ = 36275904.

The previous prime is 55709761. The next prime is 55709839. The reversal of 55709811 is 11890755.

55709811 is a `hidden beast` number, since 5 + 570 + 9 + 81 + 1 = 666.

It is not a de Polignac number, because 55709811 - 2¹¹ = 55707763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55709861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71590 + ... + 72363.

Almost surely, 2^55709811 is an apocalyptic number.

55709811 is a deficient number, since it is larger than the sum of its proper divisors (26631877).

55709811 is a wasteful number, since it uses less digits than its factorization.

55709811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144002 (or 143999 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 55709811 is about 7463.9005218451. The cubic root of 55709811 is about 381.9242446380.

The spelling of 55709811 in words is "fifty-five million, seven hundred nine thousand, eight hundred eleven".