3861821533768 has 16 divisors (see below), whose sum is σ = 7899180410160. Its totient is φ = 1755373424400.

The previous prime is 3861821533729. The next prime is 3861821533837. The reversal of 3861821533768 is 8673351281683.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21942167718 + ... + 21942167893.

It is an arithmetic number, because the mean of its divisors is an integer number (493698775635).

Almost surely, 2^{3861821533768} is an apocalyptic number.

It is an amenable number.

3861821533768 is an abundant number, since it is smaller than the sum of its proper divisors (4037358876392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3861821533768 is a wasteful number, since it uses less digits than its factorization.

3861821533768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43884335628 (or 43884335624 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 61.

The spelling of 3861821533768 in words is "three trillion, eight hundred sixty-one billion, eight hundred twenty-one million, five hundred thirty-three thousand, seven hundred sixty-eight".