12651724989 has 32 divisors (see below), whose sum is σ = 19902960000. Its totient is φ = 7915491072.

The previous prime is 12651724979. The next prime is 12651724999. The reversal of 12651724989 is 98942715621.

It is a happy number.

12651724989 is a `hidden beast` number, since 1 + 2 + 6 + 517 + 2 + 49 + 89 = 666.

It is an interprime number because it is at equal distance from previous prime (12651724979) and next prime (12651724999).

It is not a de Polignac number, because 12651724989 - 2⁸ = 12651724733 is a prime.

It is a super-2 number, since 2×12651724989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12651724919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120702 + ... + 199680.

It is an arithmetic number, because the mean of its divisors is an integer number (621967500).

Almost surely, 2^12651724989 is an apocalyptic number.

It is an amenable number.

12651724989 is a deficient number, since it is larger than the sum of its proper divisors (7251235011).

12651724989 is a wasteful number, since it uses less digits than its factorization.

12651724989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79354 (or 79348 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The spelling of 12651724989 in words is "twelve billion, six hundred fifty-one million, seven hundred twenty-four thousand, nine hundred eighty-nine".