1986394108347 has 64 divisors (see below), whose sum is σ = 3218555558400. Its totient is φ = 1200795269760.

The previous prime is 1986394108273. The next prime is 1986394108373. The reversal of 1986394108347 is 7438014936891.

1986394108347 is a `hidden beast` number, since 198 + 6 + 3 + 94 + 10 + 8 + 347 = 666.

It is not a de Polignac number, because 1986394108347 - 2¹⁶ = 1986394042811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1986394108397) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 318891429 + ... + 318897657.

It is an arithmetic number, because the mean of its divisors is an integer number (50289930600).

Almost surely, 2^{1986394108347} is an apocalyptic number.

1986394108347 is a deficient number, since it is larger than the sum of its proper divisors (1232161450053).

1986394108347 is a wasteful number, since it uses less digits than its factorization.

1986394108347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8825 (or 8819 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 1986394108347 in words is "one trillion, nine hundred eighty-six billion, three hundred ninety-four million, one hundred eight thousand, three hundred forty-seven".