39846672891 has 6 divisors (see below), whose sum is σ = 57556305300. Its totient is φ = 26564448588.

The previous prime is 39846672881. The next prime is 39846672893. The reversal of 39846672891 is 19827664893.

39846672891 is a `hidden beast` number, since 3 + 98 + 466 + 7 + 2 + 89 + 1 = 666.

It is not a de Polignac number, because 39846672891 - 2¹³ = 39846664699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39846672893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2213704041 + ... + 2213704058.

It is an arithmetic number, because the mean of its divisors is an integer number (9592717550).

Almost surely, 2^39846672891 is an apocalyptic number.

39846672891 is a deficient number, since it is larger than the sum of its proper divisors (17709632409).

39846672891 is a wasteful number, since it uses less digits than its factorization.

39846672891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4427408105 (or 4427408102 counting only the distinct ones).

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

The spelling of 39846672891 in words is "thirty-nine billion, eight hundred forty-six million, six hundred seventy-two thousand, eight hundred ninety-one".