47491681608 has 72 divisors (see below), whose sum is σ = 149623038630. Its totient is φ = 13569050880.

The previous prime is 47491681579. The next prime is 47491681673. The reversal of 47491681608 is 80618619474.

47491681608 is a `hidden beast` number, since 474 + 9 + 1 + 6 + 8 + 160 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 39116137284 + 8375544324 = 197778^2 + 91518^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6727153 + ... + 6734208.

Almost surely, 2^47491681608 is an apocalyptic number.

It is an amenable number.

47491681608 is an abundant number, since it is smaller than the sum of its proper divisors (102131357022).

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

47491681608 is a wasteful number, since it uses less digits than its factorization.

47491681608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13461387 (or 13461373 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 47491681608 in words is "forty-seven billion, four hundred ninety-one million, six hundred eighty-one thousand, six hundred eight".