55611945 has 12 divisors (see below), whose sum is σ = 96394116. Its totient is φ = 29659680.

The previous prime is 55611929. The next prime is 55612001. The reversal of 55611945 is 54911655.

55611945 is a `hidden beast` number, since 5 + 561 + 1 + 94 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 41951529 + 13660416 = 6477^2 + 3696^2 .

It is not a de Polignac number, because 55611945 - 2⁴ = 55611929 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, 617866 + ... + 617955.

It is an arithmetic number, because the mean of its divisors is an integer number (8032843).

Almost surely, 2^55611945 is an apocalyptic number.

It is an amenable number.

55611945 is a deficient number, since it is larger than the sum of its proper divisors (40782171).

55611945 is a wasteful number, since it uses less digits than its factorization.

55611945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235832 (or 1235829 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 55611945 is about 7457.3416845415. The cubic root of 55611945 is about 381.7004701303.

The spelling of 55611945 in words is "fifty-five million, six hundred eleven thousand, nine hundred forty-five".