3861773687941 has 24 divisors (see below), whose sum is σ = 4322517852744. Its totient is φ = 3429541893120.

The previous prime is 3861773687909. The next prime is 3861773687971. The reversal of 3861773687941 is 1497863771683.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 1028847091041 + 2832926596900 = 1014321^2 + 1683130^2 .

It is not a de Polignac number, because 3861773687941 - 2⁵ = 3861773687909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861773687971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2443665 + ... + 3700681.

It is an arithmetic number, because the mean of its divisors is an integer number (180104910531).

Almost surely, 2^{3861773687941} is an apocalyptic number.

It is an amenable number.

3861773687941 is a deficient number, since it is larger than the sum of its proper divisors (460744164803).

3861773687941 is a wasteful number, since it uses less digits than its factorization.

3861773687941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257369 (or 1257340 counting only the distinct ones).

The product of its digits is 256048128, while the sum is 70.

The spelling of 3861773687941 in words is "three trillion, eight hundred sixty-one billion, seven hundred seventy-three million, six hundred eighty-seven thousand, nine hundred forty-one".