3978290140164 has 36 divisors (see below), whose sum is σ = 10177392856176. Its totient is φ = 1310119643568.

The previous prime is 3978290140163. The next prime is 3978290140177. The reversal of 3978290140164 is 4610410928793.

3978290140164 is a `hidden beast` number, since 3 + 97 + 8 + 2 + 90 + 1 + 401 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 3978290140164.

It is not an unprimeable number, because it can be changed into a prime (3978290140163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 665708214 + ... + 665714189.

It is an arithmetic number, because the mean of its divisors is an integer number (282705357116).

Almost surely, 2^{3978290140164} is an apocalyptic number.

It is an amenable number.

3978290140164 is an abundant number, since it is smaller than the sum of its proper divisors (6199102716012).

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

3978290140164 is a wasteful number, since it uses less digits than its factorization.

3978290140164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331422496 (or 1331422491 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 3978290140164 in words is "three trillion, nine hundred seventy-eight billion, two hundred ninety million, one hundred forty thousand, one hundred sixty-four".