47912817889 has 4 divisors (see below), whose sum is σ = 47977304256. Its totient is φ = 47848331524.

The previous prime is 47912817863. The next prime is 47912817899. The reversal of 47912817889 is 98871821974.

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 47912817889 - 2²³ = 47904429281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47912817889.

It is not an unprimeable number, because it can be changed into a prime (47912817899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32242069 + ... + 32243554.

It is an arithmetic number, because the mean of its divisors is an integer number (11994326064).

Almost surely, 2^47912817889 is an apocalyptic number.

It is an amenable number.

47912817889 is a deficient number, since it is larger than the sum of its proper divisors (64486367).

47912817889 is an equidigital number, since it uses as much as digits as its factorization.

47912817889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64486366.

The product of its digits is 16257024, while the sum is 64.

The spelling of 47912817889 in words is "forty-seven billion, nine hundred twelve million, eight hundred seventeen thousand, eight hundred eighty-nine".