47909931144 has 32 divisors (see below), whose sum is σ = 119834925120. Its totient is φ = 15961964096.

The previous prime is 47909931079. The next prime is 47909931149. The reversal of 47909931144 is 44113990974.

It is a super-2 number, since 2×47909931144² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47909931149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451884 + ... + 547739.

It is an arithmetic number, because the mean of its divisors is an integer number (3744841410).

Almost surely, 2^47909931144 is an apocalyptic number.

It is an amenable number.

47909931144 is an abundant number, since it is smaller than the sum of its proper divisors (71924993976).

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

47909931144 is a wasteful number, since it uses less digits than its factorization.

47909931144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001629 (or 1001625 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The spelling of 47909931144 in words is "forty-seven billion, nine hundred nine million, nine hundred thirty-one thousand, one hundred forty-four".