4019856309644 has 48 divisors (see below), whose sum is σ = 8238794231808. Its totient is φ = 1680385430208.

The previous prime is 4019856309631. The next prime is 4019856309653. The reversal of 4019856309644 is 4469036589104.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4827044 + ... + 5598219.

It is an arithmetic number, because the mean of its divisors is an integer number (171641546496).

Almost surely, 2^{4019856309644} is an apocalyptic number.

It is an amenable number.

4019856309644 is an abundant number, since it is smaller than the sum of its proper divisors (4218937922164).

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

4019856309644 is a wasteful number, since it uses less digits than its factorization.

4019856309644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10425614 (or 10425612 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 59.

The spelling of 4019856309644 in words is "four trillion, nineteen billion, eight hundred fifty-six million, three hundred nine thousand, six hundred forty-four".