1649902671 has 12 divisors (see below), whose sum is σ = 2418763672. Its totient is φ = 1083517776.

The previous prime is 1649902669. The next prime is 1649902673. The reversal of 1649902671 is 1762099461.

It is an interprime number because it is at equal distance from previous prime (1649902669) and next prime (1649902673).

It is not a de Polignac number, because 1649902671 - 2¹ = 1649902669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649902673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1367476 + ... + 1368681.

Almost surely, 2^1649902671 is an apocalyptic number.

1649902671 is a deficient number, since it is larger than the sum of its proper divisors (768861001).

1649902671 is a wasteful number, since it uses less digits than its factorization.

1649902671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736230 (or 2736227 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 1649902671 is about 40618.9939683395. The cubic root of 1649902671 is about 1181.6425155973.

The spelling of 1649902671 in words is "one billion, six hundred forty-nine million, nine hundred two thousand, six hundred seventy-one".