1618446671 has 2 divisors, whose sum is σ = 1618446672. Its totient is φ = 1618446670.

The previous prime is 1618446629. The next prime is 1618446721. The reversal of 1618446671 is 1766448161.

It is a weak prime.

It is an emirp because it is prime and its reverse (1766448161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1618446671 - 2²⁶ = 1551337807 is a prime.

It is a super-3 number, since 3×1618446671³ (a number of 29 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1618446871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 809223335 + 809223336.

It is an arithmetic number, because the mean of its divisors is an integer number (809223336).

Almost surely, 2^1618446671 is an apocalyptic number.

1618446671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1618446671 is an equidigital number, since it uses as much as digits as its factorization.

1618446671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 1618446671 is about 40229.9225825753. The cubic root of 1618446671 is about 1174.0847971607.

The spelling of 1618446671 in words is "one billion, six hundred eighteen million, four hundred forty-six thousand, six hundred seventy-one".