2861872403816 has 16 divisors (see below), whose sum is σ = 5551045611300. Its totient is φ = 1381593574144.

The previous prime is 2861872403813. The next prime is 2861872403849. The reversal of 2861872403816 is 6183042781682.

It can be written as a sum of positive squares in 2 ways, for example, as 2828619422500 + 33252981316 = 1681850^2 + 182354^2 .

It is not an unprimeable number, because it can be changed into a prime (2861872403813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6167828225 + ... + 6167828688.

Almost surely, 2^{2861872403816} is an apocalyptic number.

It is an amenable number.

2861872403816 is a deficient number, since it is larger than the sum of its proper divisors (2689173207484).

2861872403816 is a wasteful number, since it uses less digits than its factorization.

2861872403816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12335656948 (or 12335656944 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 56.

The spelling of 2861872403816 in words is "two trillion, eight hundred sixty-one billion, eight hundred seventy-two million, four hundred three thousand, eight hundred sixteen".