7945478271 has 32 divisors (see below), whose sum is σ = 12391672320. Its totient is φ = 5021799552.

The previous prime is 7945478239. The next prime is 7945478287. The reversal of 7945478271 is 1728745497.

7945478271 is a `hidden beast` number, since 7 + 94 + 547 + 8 + 2 + 7 + 1 = 666.

It is not a de Polignac number, because 7945478271 - 2⁵ = 7945478239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7945478221) 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 31 ways as a sum of consecutive naturals, for example, 13560 + ... + 126786.

It is an arithmetic number, because the mean of its divisors is an integer number (387239760).

Almost surely, 2^7945478271 is an apocalyptic number.

7945478271 is a deficient number, since it is larger than the sum of its proper divisors (4446194049).

7945478271 is a wasteful number, since it uses less digits than its factorization.

7945478271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113372 (or 113366 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The square root of 7945478271 is about 89137.4122969699. The cubic root of 7945478271 is about 1995.4461617314.

The spelling of 7945478271 in words is "seven billion, nine hundred forty-five million, four hundred seventy-eight thousand, two hundred seventy-one".