3991580395078 has 8 divisors (see below), whose sum is σ = 6008677962120. Its totient is φ = 1988687741040.

The previous prime is 3991580395067. The next prime is 3991580395081. The reversal of 3991580395078 is 8705930851993.

3991580395078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3551227548 + ... + 3551228671.

It is an arithmetic number, because the mean of its divisors is an integer number (751084745265).

Almost surely, 2^{3991580395078} is an apocalyptic number.

3991580395078 is a deficient number, since it is larger than the sum of its proper divisors (2017097567042).

3991580395078 is a wasteful number, since it uses less digits than its factorization.

3991580395078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7102456502.

The product of its (nonzero) digits is 73483200, while the sum is 67.

The spelling of 3991580395078 in words is "three trillion, nine hundred ninety-one billion, five hundred eighty million, three hundred ninety-five thousand, seventy-eight".