55609651 has 2 divisors, whose sum is σ = 55609652. Its totient is φ = 55609650.

The previous prime is 55609643. The next prime is 55609663. The reversal of 55609651 is 15690655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55609651 - 2³ = 55609643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55609651.

It is not a weakly prime, because it can be changed into another prime (55609681) 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 as a sum of consecutive naturals, namely, 27804825 + 27804826.

It is an arithmetic number, because the mean of its divisors is an integer number (27804826).

Almost surely, 2^55609651 is an apocalyptic number.

55609651 is a deficient number, since it is larger than the sum of its proper divisors (1).

55609651 is an equidigital number, since it uses as much as digits as its factorization.

55609651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 55609651 is about 7457.1878747957. The cubic root of 55609651 is about 381.6952216600.

The spelling of 55609651 in words is "fifty-five million, six hundred nine thousand, six hundred fifty-one".