3661838854847 has 2 divisors, whose sum is σ = 3661838854848. Its totient is φ = 3661838854846.

The previous prime is 3661838854721. The next prime is 3661838854871. The reversal of 3661838854847 is 7484588381663.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3661838854847 - 2⁴⁰ = 2562327227071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3661838854147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830919427423 + 1830919427424.

It is an arithmetic number, because the mean of its divisors is an integer number (1830919427424).

Almost surely, 2^{3661838854847} is an apocalyptic number.

3661838854847 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661838854847 is an equidigital number, since it uses as much as digits as its factorization.

3661838854847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 743178240, while the sum is 71.

The spelling of 3661838854847 in words is "three trillion, six hundred sixty-one billion, eight hundred thirty-eight million, eight hundred fifty-four thousand, eight hundred forty-seven".