39894272647 has 8 divisors (see below), whose sum is σ = 40519169600. Its totient is φ = 39272373504.

The previous prime is 39894272629. The next prime is 39894272653. The reversal of 39894272647 is 74627249893.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39894272647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39894272687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 722622 + ... + 775867.

It is an arithmetic number, because the mean of its divisors is an integer number (5064896200).

Almost surely, 2^39894272647 is an apocalyptic number.

39894272647 is a deficient number, since it is larger than the sum of its proper divisors (624896953).

39894272647 is a wasteful number, since it uses less digits than its factorization.

39894272647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498905.

The product of its digits is 36578304, while the sum is 61.

The spelling of 39894272647 in words is "thirty-nine billion, eight hundred ninety-four million, two hundred seventy-two thousand, six hundred forty-seven".