1651443996 has 12 divisors (see below), whose sum is σ = 3853369352. Its totient is φ = 550481328.

The previous prime is 1651443979. The next prime is 1651444009. The reversal of 1651443996 is 6993441561.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68810155 + ... + 68810178.

Almost surely, 2^1651443996 is an apocalyptic number.

It is an amenable number.

1651443996 is an abundant number, since it is smaller than the sum of its proper divisors (2201925356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1651443996 is a wasteful number, since it uses less digits than its factorization.

1651443996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137620340 (or 137620338 counting only the distinct ones).

The product of its digits is 699840, while the sum is 48.

The square root of 1651443996 is about 40637.9624981371. The cubic root of 1651443996 is about 1182.0103611942.

The spelling of 1651443996 in words is "one billion, six hundred fifty-one million, four hundred forty-three thousand, nine hundred ninety-six".