7912145128 has 32 divisors (see below), whose sum is σ = 15322187520. Its totient is φ = 3826368000.

The previous prime is 7912145119. The next prime is 7912145161. The reversal of 7912145128 is 8215412197.

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 in 7 ways as a sum of consecutive naturals, for example, 508423 + ... + 523753.

It is an arithmetic number, because the mean of its divisors is an integer number (478818360).

Almost surely, 2^7912145128 is an apocalyptic number.

It is an amenable number.

7912145128 is a deficient number, since it is larger than the sum of its proper divisors (7410042392).

7912145128 is a wasteful number, since it uses less digits than its factorization.

7912145128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17449 (or 17445 counting only the distinct ones).

The product of its digits is 40320, while the sum is 40.

The square root of 7912145128 is about 88950.2396174400. The cubic root of 7912145128 is about 1992.6517956778.

The spelling of 7912145128 in words is "seven billion, nine hundred twelve million, one hundred forty-five thousand, one hundred twenty-eight".