47474745640 has 48 divisors (see below), whose sum is σ = 124257885300. Its totient is φ = 16277054976.

The previous prime is 47474745629. The next prime is 47474745673. The reversal of 47474745640 is 4654747474.

It can be written as a sum of positive squares in 2 ways, for example, as 46912960836 + 561784804 = 216594^2 + 23702^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12108945 + ... + 12112864.

Almost surely, 2^47474745640 is an apocalyptic number.

47474745640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47474745640 is an abundant number, since it is smaller than the sum of its proper divisors (76783139660).

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

47474745640 is a wasteful number, since it uses less digits than its factorization.

47474745640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24221834 (or 24221823 counting only the distinct ones).

The product of its (nonzero) digits is 10536960, while the sum is 52.

The spelling of 47474745640 in words is "forty-seven billion, four hundred seventy-four million, seven hundred forty-five thousand, six hundred forty".