3819720128542 has 32 divisors (see below), whose sum is σ = 6079704635520. Its totient is φ = 1793640890880.

The previous prime is 3819720128467. The next prime is 3819720128563. The reversal of 3819720128542 is 2458210279183.

It is a self number, because there is not a number n which added to its sum of digits gives 3819720128542.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29841483 + ... + 29969209.

It is an arithmetic number, because the mean of its divisors is an integer number (189990769860).

Almost surely, 2^{3819720128542} is an apocalyptic number.

3819720128542 is a deficient number, since it is larger than the sum of its proper divisors (2259984506978).

3819720128542 is a wasteful number, since it uses less digits than its factorization.

3819720128542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129636.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 3819720128542 in words is "three trillion, eight hundred nineteen billion, seven hundred twenty million, one hundred twenty-eight thousand, five hundred forty-two".