12615749929 has 8 divisors (see below), whose sum is σ = 13363505928. Its totient is φ = 11868622080.

The previous prime is 12615749899. The next prime is 12615749959. The reversal of 12615749929 is 92994751621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12615749899) and next prime (12615749959).

It can be written as a sum of positive squares in 4 ways, for example, as 2201955625 + 10413794304 = 46925^2 + 102048^2 .

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

It is not a de Polignac number, because 12615749929 - 2¹³ = 12615741737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12615749929.

It is not an unprimeable number, because it can be changed into a prime (12615749959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115362 + ... + 196315.

It is an arithmetic number, because the mean of its divisors is an integer number (1670438241).

Almost surely, 2^12615749929 is an apocalyptic number.

It is an amenable number.

12615749929 is a deficient number, since it is larger than the sum of its proper divisors (747755999).

12615749929 is a wasteful number, since it uses less digits than its factorization.

12615749929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314075.

The product of its digits is 2449440, while the sum is 55.

The spelling of 12615749929 in words is "twelve billion, six hundred fifteen million, seven hundred forty-nine thousand, nine hundred twenty-nine".