13051216645 has 8 divisors (see below), whose sum is σ = 16084742904. Its totient is φ = 10158784704.

The previous prime is 13051216643. The next prime is 13051216649. The reversal of 13051216645 is 54661215031.

It can be written as a sum of positive squares in 4 ways, for example, as 632120164 + 12419096481 = 25142^2 + 111441^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13051216645 - 2¹ = 13051216643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13051216645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13051216643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35273374 + ... + 35273743.

It is an arithmetic number, because the mean of its divisors is an integer number (2010592863).

Almost surely, 2^13051216645 is an apocalyptic number.

It is an amenable number.

13051216645 is a deficient number, since it is larger than the sum of its proper divisors (3033526259).

13051216645 is an equidigital number, since it uses as much as digits as its factorization.

13051216645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70547159.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 13051216645 in words is "thirteen billion, fifty-one million, two hundred sixteen thousand, six hundred forty-five".