47171179440 has 480 divisors, whose sum is σ = 204827890176. Its totient is φ = 9801492480.

The previous prime is 47171179399. The next prime is 47171179441. The reversal of 47171179440 is 4497117174.

47171179440 is a `hidden beast` number, since 4 + 71 + 71 + 1 + 79 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (47171179441) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1481124 + ... + 1512636.

Almost surely, 2^47171179440 is an apocalyptic number.

47171179440 is a gapful number since it is divisible by the number (40) 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 47171179440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102413945088).

47171179440 is an abundant number, since it is smaller than the sum of its proper divisors (157656710736).

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

47171179440 is a wasteful number, since it uses less digits than its factorization.

47171179440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31559 (or 31541 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The spelling of 47171179440 in words is "forty-seven billion, one hundred seventy-one million, one hundred seventy-nine thousand, four hundred forty".