1649534507 has 4 divisors (see below), whose sum is σ = 1649972736. Its totient is φ = 1649096280.

The previous prime is 1649534503. The next prime is 1649534519. The reversal of 1649534507 is 7054359461.

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

It is a cyclic number.

It is not a de Polignac number, because 1649534507 - 2² = 1649534503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1649534503) 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, 213419 + ... + 221012.

It is an arithmetic number, because the mean of its divisors is an integer number (412493184).

Almost surely, 2^1649534507 is an apocalyptic number.

1649534507 is a deficient number, since it is larger than the sum of its proper divisors (438229).

1649534507 is an equidigital number, since it uses as much as digits as its factorization.

1649534507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438228.

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 1649534507 is about 40614.4617962617. The cubic root of 1649534507 is about 1181.5546173624.

The spelling of 1649534507 in words is "one billion, six hundred forty-nine million, five hundred thirty-four thousand, five hundred seven".