671530264605 has 24 divisors (see below), whose sum is σ = 1166137379160. Its totient is φ = 357487447680.

The previous prime is 671530264583. The next prime is 671530264649. The reversal of 671530264605 is 506462035176.

671530264605 is a `hidden beast` number, since 6 + 7 + 1 + 5 + 30 + 2 + 6 + 4 + 605 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 226026078084 + 445504186521 = 475422^2 + 667461^2 .

It is not a de Polignac number, because 671530264605 - 2⁶ = 671530264541 is a prime.

It is a super-2 number, since 2×671530264605² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13767610 + ... + 13816299.

It is an arithmetic number, because the mean of its divisors is an integer number (48589057465).

Almost surely, 2^671530264605 is an apocalyptic number.

It is an amenable number.

671530264605 is a deficient number, since it is larger than the sum of its proper divisors (494607114555).

671530264605 is a wasteful number, since it uses less digits than its factorization.

671530264605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27584461 (or 27584458 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 671530264605 in words is "six hundred seventy-one billion, five hundred thirty million, two hundred sixty-four thousand, six hundred five".