3871877218385 has 32 divisors (see below), whose sum is σ = 5073388369920. Its totient is φ = 2813273553600.

The previous prime is 3871877218357. The next prime is 3871877218409. The reversal of 3871877218385 is 5838127781783.

It is not a de Polignac number, because 3871877218385 - 2¹⁰ = 3871877217361 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 425897690 + ... + 425906780.

It is an arithmetic number, because the mean of its divisors is an integer number (158543386560).

Almost surely, 2^{3871877218385} is an apocalyptic number.

It is an amenable number.

3871877218385 is a deficient number, since it is larger than the sum of its proper divisors (1201511151535).

3871877218385 is a wasteful number, since it uses less digits than its factorization.

3871877218385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15509.

The product of its digits is 126443520, while the sum is 68.

The spelling of 3871877218385 in words is "three trillion, eight hundred seventy-one billion, eight hundred seventy-seven million, two hundred eighteen thousand, three hundred eighty-five".