2355855779 has 2 divisors, whose sum is σ = 2355855780. Its totient is φ = 2355855778.

The previous prime is 2355855769. The next prime is 2355855811. The reversal of 2355855779 is 9775585532.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2355855779 - 2⁴ = 2355855763 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2355855769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1177927889 + 1177927890.

It is an arithmetic number, because the mean of its divisors is an integer number (1177927890).

Almost surely, 2^2355855779 is an apocalyptic number.

2355855779 is a deficient number, since it is larger than the sum of its proper divisors (1).

2355855779 is an equidigital number, since it uses as much as digits as its factorization.

2355855779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13230000, while the sum is 56.

The square root of 2355855779 is about 48537.1587446154. The cubic root of 2355855779 is about 1330.6062736130.

The spelling of 2355855779 in words is "two billion, three hundred fifty-five million, eight hundred fifty-five thousand, seven hundred seventy-nine".