618779851 has 2 divisors, whose sum is σ = 618779852. Its totient is φ = 618779850.

The previous prime is 618779827. The next prime is 618779869. The reversal of 618779851 is 158977816.

618779851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 618779851 - 2⁷ = 618779723 is a prime.

It is not a weakly prime, because it can be changed into another prime (618779881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309389925 + 309389926.

It is an arithmetic number, because the mean of its divisors is an integer number (309389926).

Almost surely, 2^618779851 is an apocalyptic number.

618779851 is a deficient number, since it is larger than the sum of its proper divisors (1).

618779851 is an equidigital number, since it uses as much as digits as its factorization.

618779851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 52.

The square root of 618779851 is about 24875.2859481052. The cubic root of 618779851 is about 852.1421635823.

The spelling of 618779851 in words is "six hundred eighteen million, seven hundred seventy-nine thousand, eight hundred fifty-one".