3861821736667 has 2 divisors, whose sum is σ = 3861821736668. Its totient is φ = 3861821736666.

The previous prime is 3861821736659. The next prime is 3861821736683. The reversal of 3861821736667 is 7666371281683.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3861821736667 - 2³ = 3861821736659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3861821736599 and 3861821736608.

It is not a weakly prime, because it can be changed into another prime (3861821736467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1930910868333 + 1930910868334.

It is an arithmetic number, because the mean of its divisors is an integer number (1930910868334).

Almost surely, 2^{3861821736667} is an apocalyptic number.

3861821736667 is a deficient number, since it is larger than the sum of its proper divisors (1).

3861821736667 is an equidigital number, since it uses as much as digits as its factorization.

3861821736667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73156608, while the sum is 64.

It can be divided in two parts, 386182 and 1736667, that added together give a square (2122849 = 1457²).

The spelling of 3861821736667 in words is "three trillion, eight hundred sixty-one billion, eight hundred twenty-one million, seven hundred thirty-six thousand, six hundred sixty-seven".