1618849874 has 4 divisors (see below), whose sum is σ = 2428274814. Its totient is φ = 809424936.

The previous prime is 1618849873. The next prime is 1618849877. The reversal of 1618849874 is 4789488161.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1485562849 + 133287025 = 38543^2 + 11545^2 .

It is not an unprimeable number, because it can be changed into a prime (1618849873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404712467 + ... + 404712470.

Almost surely, 2^1618849874 is an apocalyptic number.

1618849874 is a deficient number, since it is larger than the sum of its proper divisors (809424940).

1618849874 is an equidigital number, since it uses as much as digits as its factorization.

1618849874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809424939.

The product of its digits is 3096576, while the sum is 56.

The square root of 1618849874 is about 40234.9335031139. The cubic root of 1618849874 is about 1174.1822888305.

The spelling of 1618849874 in words is "one billion, six hundred eighteen million, eight hundred forty-nine thousand, eight hundred seventy-four".