47486665728 has 132 divisors (see below), whose sum is σ = 141845677740. Its totient is φ = 15282978816.

The previous prime is 47486665711. The next prime is 47486665729. The reversal of 47486665728 is 82756668474.

It can be written as a sum of positive squares in 2 ways, for example, as 36974674944 + 10511990784 = 192288^2 + 102528^2 .

It is not an unprimeable number, because it can be changed into a prime (47486665729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178426 + ... + 356102.

Almost surely, 2^47486665728 is an apocalyptic number.

47486665728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47486665728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70922838870).

47486665728 is an abundant number, since it is smaller than the sum of its proper divisors (94359012012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47486665728 is a wasteful number, since it uses less digits than its factorization.

47486665728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177732 (or 177711 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 63.

The spelling of 47486665728 in words is "forty-seven billion, four hundred eighty-six million, six hundred sixty-five thousand, seven hundred twenty-eight".