3977845555871 has 16 divisors (see below), whose sum is σ = 4528405191168. Its totient is φ = 3458793861600.

The previous prime is 3977845555843. The next prime is 3977845555907. The reversal of 3977845555871 is 1785555487793.

It is not a de Polignac number, because 3977845555871 - 2⁶ = 3977845555807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3977845555841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3959045 + ... + 4861041.

It is an arithmetic number, because the mean of its divisors is an integer number (283025324448).

Almost surely, 2^{3977845555871} is an apocalyptic number.

3977845555871 is a deficient number, since it is larger than the sum of its proper divisors (550559635297).

3977845555871 is a wasteful number, since it uses less digits than its factorization.

3977845555871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919462.

The product of its digits is 1481760000, while the sum is 74.

The spelling of 3977845555871 in words is "three trillion, nine hundred seventy-seven billion, eight hundred forty-five million, five hundred fifty-five thousand, eight hundred seventy-one".