47720731720 has 16 divisors (see below), whose sum is σ = 107371646460. Its totient is φ = 19088292672.

The previous prime is 47720731673. The next prime is 47720731727. The reversal of 47720731720 is 2713702774.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 45865362244 + 1855369476 = 214162^2 + 43074^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1193018293 = 47720731720 / (4 + 7 + 7 + 2 + 0 + 7 + 3 + 1 + 7 + 2 + 0).

It is not an unprimeable number, because it can be changed into a prime (47720731727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596509107 + ... + 596509186.

Almost surely, 2^47720731720 is an apocalyptic number.

47720731720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47720731720 is an abundant number, since it is smaller than the sum of its proper divisors (59650914740).

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

47720731720 is a wasteful number, since it uses less digits than its factorization.

47720731720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193018304 (or 1193018300 counting only the distinct ones).

The product of its (nonzero) digits is 115248, while the sum is 40.

The spelling of 47720731720 in words is "forty-seven billion, seven hundred twenty million, seven hundred thirty-one thousand, seven hundred twenty".