12147617645 has 4 divisors (see below), whose sum is σ = 14577141180. Its totient is φ = 9718094112.

The previous prime is 12147617627. The next prime is 12147617663. The reversal of 12147617645 is 54671674121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12147617627) and next prime (12147617663).

It can be written as a sum of positive squares in 2 ways, for example, as 2917404169 + 9230213476 = 54013^2 + 96074^2 .

It is a cyclic number.

It is not a de Polignac number, because 12147617645 - 2¹⁸ = 12147355501 is a prime.

It is a super-3 number, since 3×12147617645³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 12147617596 and 12147617605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1214761760 + ... + 1214761769.

It is an arithmetic number, because the mean of its divisors is an integer number (3644285295).

Almost surely, 2^12147617645 is an apocalyptic number.

It is an amenable number.

12147617645 is a deficient number, since it is larger than the sum of its proper divisors (2429523535).

12147617645 is an equidigital number, since it uses as much as digits as its factorization.

12147617645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429523534.

The product of its digits is 282240, while the sum is 44.

The spelling of 12147617645 in words is "twelve billion, one hundred forty-seven million, six hundred seventeen thousand, six hundred forty-five".