671325807428 has 6 divisors (see below), whose sum is σ = 1174820163006. Its totient is φ = 335662903712.

The previous prime is 671325807419. The next prime is 671325807463. The reversal of 671325807428 is 824708523176.

It can be written as a sum of positive squares in only one way, i.e., 636663559744 + 34662247684 = 797912^2 + 186178^2 .

It is a super-2 number, since 2×671325807428² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 671325807428.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83915725925 + ... + 83915725932.

It is an arithmetic number, because the mean of its divisors is an integer number (195803360501).

Almost surely, 2^671325807428 is an apocalyptic number.

It is an amenable number.

671325807428 is a deficient number, since it is larger than the sum of its proper divisors (503494355578).

671325807428 is a wasteful number, since it uses less digits than its factorization.

671325807428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167831451861 (or 167831451859 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 53.

The spelling of 671325807428 in words is "six hundred seventy-one billion, three hundred twenty-five million, eight hundred seven thousand, four hundred twenty-eight".