1649295449 has 4 divisors (see below), whose sum is σ = 1702498560. Its totient is φ = 1596092340.

The previous prime is 1649295433. The next prime is 1649295463. The reversal of 1649295449 is 9445929461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1649295449 - 2⁴ = 1649295433 is a prime.

It is a super-2 number, since 2×1649295449² = 5440350956184223202, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1649295449.

It is not an unprimeable number, because it can be changed into a prime (1649295419) 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, 26601509 + ... + 26601570.

It is an arithmetic number, because the mean of its divisors is an integer number (425624640).

Almost surely, 2^1649295449 is an apocalyptic number.

It is an amenable number.

1649295449 is a deficient number, since it is larger than the sum of its proper divisors (53203111).

1649295449 is an equidigital number, since it uses as much as digits as its factorization.

1649295449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53203110.

The product of its digits is 2799360, while the sum is 53.

The square root of 1649295449 is about 40611.5186738935. The cubic root of 1649295449 is about 1181.4975358588.

The spelling of 1649295449 in words is "one billion, six hundred forty-nine million, two hundred ninety-five thousand, four hundred forty-nine".