12512511145 has 8 divisors (see below), whose sum is σ = 15091232904. Its totient is φ = 9959195904.

The previous prime is 12512511103. The next prime is 12512511169. The reversal of 12512511145 is 54111521521.

It can be written as a sum of positive squares in 4 ways, for example, as 9164615824 + 3347895321 = 95732^2 + 57861^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12512511145 - 2²³ = 12504122537 is a prime.

It is a super-2 number, since 2×12512511145² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

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, 6350544 + ... + 6352513.

It is an arithmetic number, because the mean of its divisors is an integer number (1886404113).

Almost surely, 2^12512511145 is an apocalyptic number.

It is an amenable number.

12512511145 is a deficient number, since it is larger than the sum of its proper divisors (2578721759).

12512511145 is a wasteful number, since it uses less digits than its factorization.

12512511145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12703259.

The product of its digits is 2000, while the sum is 28.

The spelling of 12512511145 in words is "twelve billion, five hundred twelve million, five hundred eleven thousand, one hundred forty-five".