3957818973895 has 8 divisors (see below), whose sum is σ = 4865221373040. Its totient is φ = 3089029442880.

The previous prime is 3957818973869. The next prime is 3957818973919. The reversal of 3957818973895 is 5983798187593.

3957818973895 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 de Polignac number, because none of the positive numbers 2^k-3957818973895 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9653216805 + ... + 9653217214.

It is an arithmetic number, because the mean of its divisors is an integer number (608152671630).

Almost surely, 2^{3957818973895} is an apocalyptic number.

3957818973895 is a deficient number, since it is larger than the sum of its proper divisors (907402399145).

3957818973895 is a wasteful number, since it uses less digits than its factorization.

3957818973895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19306434065.

The product of its digits is 4115059200, while the sum is 82.

The spelling of 3957818973895 in words is "three trillion, nine hundred fifty-seven billion, eight hundred eighteen million, nine hundred seventy-three thousand, eight hundred ninety-five".