618856471 has 2 divisors, whose sum is σ = 618856472. Its totient is φ = 618856470.

The previous prime is 618856439. The next prime is 618856489. The reversal of 618856471 is 174658816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 618856471 - 2⁵ = 618856439 is a prime.

It is a super-3 number, since 3×618856471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618856171) 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, 309428235 + 309428236.

It is an arithmetic number, because the mean of its divisors is an integer number (309428236).

Almost surely, 2^618856471 is an apocalyptic number.

618856471 is a deficient number, since it is larger than the sum of its proper divisors (1).

618856471 is an equidigital number, since it uses as much as digits as its factorization.

618856471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 46.

The square root of 618856471 is about 24876.8259832319. The cubic root of 618856471 is about 852.1773341080.

The spelling of 618856471 in words is "six hundred eighteen million, eight hundred fifty-six thousand, four hundred seventy-one".