47440645728 has 48 divisors (see below), whose sum is σ = 142321939200. Its totient is φ = 13554470016.

The previous prime is 47440645669. The next prime is 47440645751. The reversal of 47440645728 is 82754604474.

It is a happy number.

47440645728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×47440645728² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35297428 + ... + 35298771.

It is an arithmetic number, because the mean of its divisors is an integer number (2965040400).

Almost surely, 2^47440645728 is an apocalyptic number.

47440645728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

47440645728 is an abundant number, since it is smaller than the sum of its proper divisors (94881293472).

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

47440645728 is a wasteful number, since it uses less digits than its factorization.

47440645728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70596219 (or 70596211 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 51.

The spelling of 47440645728 in words is "forty-seven billion, four hundred forty million, six hundred forty-five thousand, seven hundred twenty-eight".