47128066681 has 16 divisors (see below), whose sum is σ = 49741267968. Its totient is φ = 44601894400.

The previous prime is 47128066651. The next prime is 47128066691. The reversal of 47128066681 is 18666082174.

It is a cyclic number.

It is not a de Polignac number, because 47128066681 - 2²¹ = 47125969529 is a prime.

It is a super-2 number, since 2×47128066681² (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 (47128066631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109536 + ... + 325966.

It is an arithmetic number, because the mean of its divisors is an integer number (3108829248).

Almost surely, 2^47128066681 is an apocalyptic number.

47128066681 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

47128066681 is a deficient number, since it is larger than the sum of its proper divisors (2613201287).

47128066681 is a wasteful number, since it uses less digits than its factorization.

47128066681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216632.

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 47128066681 in words is "forty-seven billion, one hundred twenty-eight million, sixty-six thousand, six hundred eighty-one".