12605981145 has 16 divisors (see below), whose sum is σ = 20865072960. Its totient is φ = 6491355584.

The previous prime is 12605981131. The next prime is 12605981159. The reversal of 12605981145 is 54118950621.

It is an interprime number because it is at equal distance from previous prime (12605981131) and next prime (12605981159).

It is a cyclic number.

It is not a de Polignac number, because 12605981145 - 2²⁰ = 12604932569 is a prime.

It is a super-2 number, since 2×12605981145² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12605981097 and 12605981106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14489199 + ... + 14490068.

It is an arithmetic number, because the mean of its divisors is an integer number (1304067060).

Almost surely, 2^12605981145 is an apocalyptic number.

12605981145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12605981145 is a deficient number, since it is larger than the sum of its proper divisors (8259091815).

12605981145 is a wasteful number, since it uses less digits than its factorization.

12605981145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28979304.

The product of its (nonzero) digits is 86400, while the sum is 42.

The spelling of 12605981145 in words is "twelve billion, six hundred five million, nine hundred eighty-one thousand, one hundred forty-five".