1618649468 has 12 divisors (see below), whose sum is σ = 2886082920. Its totient is φ = 794054352.

The previous prime is 1618649467. The next prime is 1618649489. The reversal of 1618649468 is 8649468161.

It is a super-2 number, since 2×1618649468² = 5240052200513366048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1618649467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3817358 + ... + 3817781.

It is an arithmetic number, because the mean of its divisors is an integer number (240506910).

Almost surely, 2^1618649468 is an apocalyptic number.

It is an amenable number.

1618649468 is a deficient number, since it is larger than the sum of its proper divisors (1267433452).

1618649468 is a wasteful number, since it uses less digits than its factorization.

1618649468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7635196 (or 7635194 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 53.

The square root of 1618649468 is about 40232.4429782731. The cubic root of 1618649468 is about 1174.1338340828.

The spelling of 1618649468 in words is "one billion, six hundred eighteen million, six hundred forty-nine thousand, four hundred sixty-eight".