47926831681 has 32 divisors (see below), whose sum is σ = 52659694080. Its totient is φ = 43441852416.

The previous prime is 47926831661. The next prime is 47926831691. The reversal of 47926831681 is 18613862974.

It is a cyclic number.

It is not a de Polignac number, because 47926831681 - 2⁷ = 47926831553 is a prime.

It is a super-2 number, since 2×47926831681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47926831621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18368505 + ... + 18371113.

It is an arithmetic number, because the mean of its divisors is an integer number (1645615440).

Almost surely, 2^47926831681 is an apocalyptic number.

It is an amenable number.

47926831681 is a deficient number, since it is larger than the sum of its proper divisors (4732862399).

47926831681 is a wasteful number, since it uses less digits than its factorization.

47926831681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033.

The product of its digits is 3483648, while the sum is 55.

The spelling of 47926831681 in words is "forty-seven billion, nine hundred twenty-six million, eight hundred thirty-one thousand, six hundred eighty-one".