47947652640 has 72 divisors (see below), whose sum is σ = 163621369548. Its totient is φ = 12786040320.

The previous prime is 47947652603. The next prime is 47947652651. The reversal of 47947652640 is 4625674974.

47947652640 is a `hidden beast` number, since 4 + 7 + 9 + 4 + 76 + 526 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 46557555984 + 1390096656 = 215772^2 + 37284^2 .

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 11 ways as a sum of consecutive naturals, for example, 16647051 + ... + 16649930.

Almost surely, 2^47947652640 is an apocalyptic number.

47947652640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47947652640 is an abundant number, since it is smaller than the sum of its proper divisors (115673716908).

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

47947652640 is a wasteful number, since it uses less digits than its factorization.

47947652640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33297002 (or 33296991 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 54.

The spelling of 47947652640 in words is "forty-seven billion, nine hundred forty-seven million, six hundred fifty-two thousand, six hundred forty".