55999611 has 24 divisors (see below), whose sum is σ = 83572944. Its totient is φ = 36106560.

The previous prime is 55999597. The next prime is 55999633. The reversal of 55999611 is 11699955.

It is a happy number.

55999611 is a `hidden beast` number, since 559 + 9 + 96 + 1 + 1 = 666.

It is not a de Polignac number, because 55999611 - 2¹⁸ = 55737467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55999651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69865 + ... + 70661.

It is an arithmetic number, because the mean of its divisors is an integer number (3482206).

Almost surely, 2^55999611 is an apocalyptic number.

55999611 is a deficient number, since it is larger than the sum of its proper divisors (27573333).

55999611 is a wasteful number, since it uses less digits than its factorization.

55999611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051 (or 1048 counting only the distinct ones).

The product of its digits is 109350, while the sum is 45.

The square root of 55999611 is about 7483.2887823470. The cubic root of 55999611 is about 382.5853506831.

The spelling of 55999611 in words is "fifty-five million, nine hundred ninety-nine thousand, six hundred eleven".