1649268916 has 24 divisors (see below), whose sum is σ = 2968882560. Its totient is φ = 801269952.

The previous prime is 1649268877. The next prime is 1649268919. The reversal of 1649268916 is 6198629461.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649268919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5425 + ... + 57688.

It is an arithmetic number, because the mean of its divisors is an integer number (123703440).

Almost surely, 2^1649268916 is an apocalyptic number.

It is an amenable number.

1649268916 is a deficient number, since it is larger than the sum of its proper divisors (1319613644).

1649268916 is a wasteful number, since it uses less digits than its factorization.

1649268916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63303 (or 63301 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 52.

The square root of 1649268916 is about 40611.1920041754. The cubic root of 1649268916 is about 1181.4912000539.

The spelling of 1649268916 in words is "one billion, six hundred forty-nine million, two hundred sixty-eight thousand, nine hundred sixteen".