3871878615387 has 32 divisors (see below), whose sum is σ = 6282967348800. Its totient is φ = 2345641127424.

The previous prime is 3871878615277. The next prime is 3871878615389. The reversal of 3871878615387 is 7835168781783.

3871878615387 is a `hidden beast` number, since 3 + 8 + 7 + 1 + 8 + 7 + 86 + 1 + 538 + 7 = 666.

It is not a de Polignac number, because 3871878615387 - 2¹⁴ = 3871878599003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3871878615389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145425748 + ... + 145452369.

It is an arithmetic number, because the mean of its divisors is an integer number (196342729650).

Almost surely, 2^{3871878615387} is an apocalyptic number.

3871878615387 is a deficient number, since it is larger than the sum of its proper divisors (2411088733413).

3871878615387 is a wasteful number, since it uses less digits than its factorization.

3871878615387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290878172 (or 290878166 counting only the distinct ones).

The product of its digits is 379330560, while the sum is 72.

The spelling of 3871878615387 in words is "three trillion, eight hundred seventy-one billion, eight hundred seventy-eight million, six hundred fifteen thousand, three hundred eighty-seven".