1649632629 has 4 divisors (see below), whose sum is σ = 2199510176. Its totient is φ = 1099755084.

The previous prime is 1649632627. The next prime is 1649632651. The reversal of 1649632629 is 9262369461.

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 not a de Polignac number, because 1649632629 - 2¹ = 1649632627 is a prime.

It is a super-2 number, since 2×1649632629² = 5442575621322903282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649632627) 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, 274938769 + ... + 274938774.

It is an arithmetic number, because the mean of its divisors is an integer number (549877544).

Almost surely, 2^1649632629 is an apocalyptic number.

It is an amenable number.

1649632629 is a deficient number, since it is larger than the sum of its proper divisors (549877547).

1649632629 is an equidigital number, since it uses as much as digits as its factorization.

1649632629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549877546.

The product of its digits is 839808, while the sum is 48.

The square root of 1649632629 is about 40615.6697470324. The cubic root of 1649632629 is about 1181.5780450230.

The spelling of 1649632629 in words is "one billion, six hundred forty-nine million, six hundred thirty-two thousand, six hundred twenty-nine".