12658070549 has 4 divisors (see below), whose sum is σ = 12660377100. Its totient is φ = 12655764000.

The previous prime is 12658070543. The next prime is 12658070561. The reversal of 12658070549 is 94507085621.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7524348049 + 5133722500 = 86743^2 + 71650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12658070549 is a prime.

It is a super-2 number, since 2×12658070549² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12658070543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1145024 + ... + 1156025.

It is an arithmetic number, because the mean of its divisors is an integer number (3165094275).

Almost surely, 2^12658070549 is an apocalyptic number.

It is an amenable number.

12658070549 is a deficient number, since it is larger than the sum of its proper divisors (2306551).

12658070549 is an equidigital number, since it uses as much as digits as its factorization.

12658070549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306550.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 12658070549 in words is "twelve billion, six hundred fifty-eight million, seventy thousand, five hundred forty-nine".