75471943876681 has 27 divisors (see below), whose sum is σ = 88125519004117. Its totient is φ = 64573535248640.

The previous prime is 75471943876643. The next prime is 75471943876697. The reversal of 75471943876681 is 18667834917457.

It is a happy number.

The square root of 75471943876681 is 8687459.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 29079498436681 + 46392445440000 = 5392541^2 + 6811200^2 .

It is not a de Polignac number, because 75471943876681 - 2¹¹ = 75471943874633 is a prime.

It is a super-2 number, since 2×75471943876681² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75471943876598 and 75471943876607.

It is not an unprimeable number, because it can be changed into a prime (75471943846681) 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 26 ways as a sum of consecutive naturals, for example, 1624531605 + ... + 1624578061.

Almost surely, 2^{75471943876681} is an apocalyptic number.

75471943876681 is the 8687459-th square number.

75471943876681 is the 4343730-th centered octagonal number.

It is an amenable number.

75471943876681 is a deficient number, since it is larger than the sum of its proper divisors (12653575127436).

75471943876681 is an frugal number, since it uses more digits than its factorization.

75471943876681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92970 (or 46485 counting only the distinct ones).

The product of its digits is 1706987520, while the sum is 76.

The spelling of 75471943876681 in words is "seventy-five trillion, four hundred seventy-one billion, nine hundred forty-three million, eight hundred seventy-six thousand, six hundred eighty-one".