1651444044 has 12 divisors (see below), whose sum is σ = 3853369464. Its totient is φ = 550481344.

The previous prime is 1651444021. The next prime is 1651444049. The reversal of 1651444044 is 4404441561.

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

It is a junction number, because it is equal to n+sod(n) for n = 1651443996 and 1651444014.

It is not an unprimeable number, because it can be changed into a prime (1651444049) 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, 68810157 + ... + 68810180.

It is an arithmetic number, because the mean of its divisors is an integer number (321114122).

Almost surely, 2^1651444044 is an apocalyptic number.

It is an amenable number.

1651444044 is an abundant number, since it is smaller than the sum of its proper divisors (2201925420).

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

1651444044 is a wasteful number, since it uses less digits than its factorization.

1651444044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137620344 (or 137620342 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 1651444044 is about 40637.9630887179. The cubic root of 1651444044 is about 1182.0103726461.

The spelling of 1651444044 in words is "one billion, six hundred fifty-one million, four hundred forty-four thousand, forty-four".