618869851 has 2 divisors, whose sum is σ = 618869852. Its totient is φ = 618869850.

The previous prime is 618869813. The next prime is 618869869. The reversal of 618869851 is 158968816.

618869851 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 618869851 - 2¹⁷ = 618738779 is a prime.

It is not a weakly prime, because it can be changed into another prime (618869551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309434925 + 309434926.

It is an arithmetic number, because the mean of its divisors is an integer number (309434926).

Almost surely, 2^618869851 is an apocalyptic number.

618869851 is a deficient number, since it is larger than the sum of its proper divisors (1).

618869851 is an equidigital number, since it uses as much as digits as its factorization.

618869851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 52.

The square root of 618869851 is about 24877.0949067611. The cubic root of 618869851 is about 852.1834755700.

The spelling of 618869851 in words is "six hundred eighteen million, eight hundred sixty-nine thousand, eight hundred fifty-one".