47128443881 has 4 divisors (see below), whose sum is σ = 48277918164. Its totient is φ = 45978969600.

The previous prime is 47128443877. The next prime is 47128443893. The reversal of 47128443881 is 18834482174.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11837440000 + 35291003881 = 108800^2 + 187859^2 .

It is a cyclic number.

It is not a de Polignac number, because 47128443881 - 2² = 47128443877 is a prime.

It is a super-2 number, since 2×47128443881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47128443841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574737080 + ... + 574737161.

It is an arithmetic number, because the mean of its divisors is an integer number (12069479541).

Almost surely, 2^47128443881 is an apocalyptic number.

47128443881 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

47128443881 is a deficient number, since it is larger than the sum of its proper divisors (1149474283).

47128443881 is a wasteful number, since it uses less digits than its factorization.

47128443881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149474282.

The product of its digits is 1376256, while the sum is 50.

The spelling of 47128443881 in words is "forty-seven billion, one hundred twenty-eight million, four hundred forty-three thousand, eight hundred eighty-one".