47671528681 has 4 divisors (see below), whose sum is σ = 54481747072. Its totient is φ = 40861310292.

The previous prime is 47671528679. The next prime is 47671528687. The reversal of 47671528681 is 18682517674.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18682517674 = 2 ⋅9341258837.

It is a cyclic number.

It is not a de Polignac number, because 47671528681 - 2¹ = 47671528679 is a prime.

It is a super-3 number, since 3×47671528681³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47671528687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3405109185 + ... + 3405109198.

It is an arithmetic number, because the mean of its divisors is an integer number (13620436768).

Almost surely, 2^47671528681 is an apocalyptic number.

It is an amenable number.

47671528681 is a deficient number, since it is larger than the sum of its proper divisors (6810218391).

47671528681 is an equidigital number, since it uses as much as digits as its factorization.

47671528681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6810218390.

The product of its digits is 4515840, while the sum is 55.

The spelling of 47671528681 in words is "forty-seven billion, six hundred seventy-one million, five hundred twenty-eight thousand, six hundred eighty-one".