3118440649 has 3 divisors (see below), whose sum is σ = 3118496493. Its totient is φ = 3118384806.

The previous prime is 3118440643. The next prime is 3118440709. The reversal of 3118440649 is 9460448113.

The square root of 3118440649 is 55843.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 3118440649 - 2⁵ = 3118440617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3118440643) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 27922 + ... + 83764.

It is an arithmetic number, because the mean of its divisors is an integer number (1039498831).

Almost surely, 2^3118440649 is an apocalyptic number.

3118440649 is the 55843-rd square number.

3118440649 is the 27922-nd centered octagonal number.

It is an amenable number.

3118440649 is a deficient number, since it is larger than the sum of its proper divisors (55844).

3118440649 is an frugal number, since it uses more digits than its factorization.

3118440649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111686 (or 55843 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The cubic root of 3118440649 is about 1460.9852374443.

Multiplying 3118440649 by its product of nonzero digits (82944), we get a square (258655941190656 = 16082784²).

The spelling of 3118440649 in words is "three billion, one hundred eighteen million, four hundred forty thousand, six hundred forty-nine".