3861821562841 has 16 divisors (see below), whose sum is σ = 4311452616768. Its totient is φ = 3428638617600.

The previous prime is 3861821562803. The next prime is 3861821562847. The reversal of 3861821562841 is 1482651281683.

3861821562841 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3861821562841 - 2¹³ = 3861821554649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3861821562847) 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, 2979721 + ... + 4074601.

It is an arithmetic number, because the mean of its divisors is an integer number (269465788548).

Almost surely, 2^{3861821562841} is an apocalyptic number.

It is an amenable number.

3861821562841 is a deficient number, since it is larger than the sum of its proper divisors (449631053927).

3861821562841 is a wasteful number, since it uses less digits than its factorization.

3861821562841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102392.

The product of its digits is 4423680, while the sum is 55.

The spelling of 3861821562841 in words is "three trillion, eight hundred sixty-one billion, eight hundred twenty-one million, five hundred sixty-two thousand, eight hundred forty-one".