7912457128 has 32 divisors (see below), whose sum is σ = 15729084000. Its totient is φ = 3721032000.

The previous prime is 7912457117. The next prime is 7912457177. The reversal of 7912457128 is 8217542197.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166123 + ... + 208378.

It is an arithmetic number, because the mean of its divisors is an integer number (491533875).

Almost surely, 2^7912457128 is an apocalyptic number.

It is an amenable number.

7912457128 is a deficient number, since it is larger than the sum of its proper divisors (7816626872).

7912457128 is a wasteful number, since it uses less digits than its factorization.

7912457128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374665 (or 374661 counting only the distinct ones).

The product of its digits is 282240, while the sum is 46.

The square root of 7912457128 is about 88951.9933896931. The cubic root of 7912457128 is about 1992.6779874450.

The spelling of 7912457128 in words is "seven billion, nine hundred twelve million, four hundred fifty-seven thousand, one hundred twenty-eight".