1646653049 has 8 divisors (see below), whose sum is σ = 1653072960. Its totient is φ = 1640244816.

The previous prime is 1646653027. The next prime is 1646653091. The reversal of 1646653049 is 9403566461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1646653049 - 2¹² = 1646648953 is a prime.

It is a super-2 number, since 2×1646653049² = 5422932527561992802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1645653049) 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 7 ways as a sum of consecutive naturals, for example, 364247 + ... + 368739.

It is an arithmetic number, because the mean of its divisors is an integer number (206634120).

Almost surely, 2^1646653049 is an apocalyptic number.

It is an amenable number.

1646653049 is a deficient number, since it is larger than the sum of its proper divisors (6419911).

1646653049 is an equidigital number, since it uses as much as digits as its factorization.

1646653049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5839.

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 1646653049 is about 40578.9729909469. The cubic root of 1646653049 is about 1180.8662242963.

The spelling of 1646653049 in words is "one billion, six hundred forty-six million, six hundred fifty-three thousand, forty-nine".