55611779 has 2 divisors, whose sum is σ = 55611780. Its totient is φ = 55611778.

The previous prime is 55611767. The next prime is 55611791. The reversal of 55611779 is 97711655.

It is a balanced prime because it is at equal distance from previous prime (55611767) and next prime (55611791).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55611779 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55611719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27805889 + 27805890.

It is an arithmetic number, because the mean of its divisors is an integer number (27805890).

Almost surely, 2^55611779 is an apocalyptic number.

55611779 is a deficient number, since it is larger than the sum of its proper divisors (1).

55611779 is an equidigital number, since it uses as much as digits as its factorization.

55611779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66150, while the sum is 41.

The square root of 55611779 is about 7457.3305545617. The cubic root of 55611779 is about 381.7000903417.

The spelling of 55611779 in words is "fifty-five million, six hundred eleven thousand, seven hundred seventy-nine".