618448687 has 4 divisors (see below), whose sum is σ = 625899960. Its totient is φ = 610997416.

The previous prime is 618448643. The next prime is 618448697. The reversal of 618448687 is 786844816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 618448687 - 2¹¹ = 618446639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618448637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3725512 + ... + 3725677.

It is an arithmetic number, because the mean of its divisors is an integer number (156474990).

Almost surely, 2^618448687 is an apocalyptic number.

618448687 is a deficient number, since it is larger than the sum of its proper divisors (7451273).

618448687 is an equidigital number, since it uses as much as digits as its factorization.

618448687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7451272.

The product of its digits is 2064384, while the sum is 52.

The square root of 618448687 is about 24868.6285709526. The cubic root of 618448687 is about 851.9901174950.

The spelling of 618448687 in words is "six hundred eighteen million, four hundred forty-eight thousand, six hundred eighty-seven".