1128912625009 has 15 divisors (see below), whose sum is σ = 1223179940237. Its totient is φ = 1041907441848.

The previous prime is 1128912624907. The next prime is 1128912625063. The reversal of 1128912625009 is 9005262198211.

It is a happy number.

The square root of 1128912625009 is 1062503.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 559732911409 + 569179713600 = 748153^2 + 754440^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1128912625009 is a prime.

It is a super-2 number, since 2×1128912625009² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1128912625009.

It is not an unprimeable number, because it can be changed into a prime (1128912625409) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 179559864 + ... + 179566150.

Almost surely, 2^{1128912625009} is an apocalyptic number.

1128912625009 is the 1062503-rd square number.

1128912625009 is the 531252-nd centered octagonal number.

It is an amenable number.

1128912625009 is a deficient number, since it is larger than the sum of its proper divisors (94267315228).

1128912625009 is an frugal number, since it uses more digits than its factorization.

1128912625009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12626 (or 6300 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 1128912625009 in words is "one trillion, one hundred twenty-eight billion, nine hundred twelve million, six hundred twenty-five thousand, nine".