3919871664478 has 32 divisors (see below), whose sum is σ = 7468983613440. Its totient is φ = 1498407200160.

The previous prime is 3919871664461. The next prime is 3919871664509. The reversal of 3919871664478 is 8744661789193.

3919871664478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3919871664478.

It is a congruent number.

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, 240121198 + ... + 240137521.

It is an arithmetic number, because the mean of its divisors is an integer number (233405737920).

Almost surely, 2^{3919871664478} is an apocalyptic number.

3919871664478 is a deficient number, since it is larger than the sum of its proper divisors (3549111948962).

3919871664478 is a wasteful number, since it uses less digits than its factorization.

3919871664478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480258792.

The product of its digits is 438939648, while the sum is 73.

The spelling of 3919871664478 in words is "three trillion, nine hundred nineteen billion, eight hundred seventy-one million, six hundred sixty-four thousand, four hundred seventy-eight".