671456409471 has 24 divisors (see below), whose sum is σ = 981061230240. Its totient is φ = 442480617216.

The previous prime is 671456409461. The next prime is 671456409493. The reversal of 671456409471 is 174904654176.

It is a happy number.

671456409471 is a `hidden beast` number, since 6 + 7 + 1 + 4 + 564 + 0 + 9 + 4 + 71 = 666.

It is not a de Polignac number, because 671456409471 - 2¹³ = 671456401279 is a prime.

It is a super-3 number, since 3×671456409471³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671456409451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2706291 + ... + 2943963.

It is an arithmetic number, because the mean of its divisors is an integer number (40877551260).

Almost surely, 2^671456409471 is an apocalyptic number.

671456409471 is a deficient number, since it is larger than the sum of its proper divisors (309604820769).

671456409471 is a wasteful number, since it uses less digits than its factorization.

671456409471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241295 (or 241292 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 671456409471 in words is "six hundred seventy-one billion, four hundred fifty-six million, four hundred nine thousand, four hundred seventy-one".