47864578649 has 4 divisors (see below), whose sum is σ = 48002517264. Its totient is φ = 47726640036.

The previous prime is 47864578613. The next prime is 47864578687. The reversal of 47864578649 is 94687546874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47864578649 - 2³² = 43569611353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47864578609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68968787 + ... + 68969480.

It is an arithmetic number, because the mean of its divisors is an integer number (12000629316).

Almost surely, 2^47864578649 is an apocalyptic number.

It is an amenable number.

47864578649 is a deficient number, since it is larger than the sum of its proper divisors (137938615).

47864578649 is a wasteful number, since it uses less digits than its factorization.

47864578649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137938614.

The product of its digits is 325140480, while the sum is 68.

The spelling of 47864578649 in words is "forty-seven billion, eight hundred sixty-four million, five hundred seventy-eight thousand, six hundred forty-nine".