3878198186851 has 8 divisors (see below), whose sum is σ = 3904805383200. Its totient is φ = 3851603145600.

The previous prime is 3878198186791. The next prime is 3878198186857. The reversal of 3878198186851 is 1586818918783.

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

It is not a de Polignac number, because 3878198186851 - 2⁹ = 3878198186339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3878198186857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2398006 + ... + 3675163.

It is an arithmetic number, because the mean of its divisors is an integer number (488100672900).

Almost surely, 2^{3878198186851} is an apocalyptic number.

3878198186851 is a deficient number, since it is larger than the sum of its proper divisors (26607196349).

3878198186851 is a wasteful number, since it uses less digits than its factorization.

3878198186851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6077549.

The product of its digits is 185794560, while the sum is 73.

The spelling of 3878198186851 in words is "three trillion, eight hundred seventy-eight billion, one hundred ninety-eight million, one hundred eighty-six thousand, eight hundred fifty-one".