79803944545 has 16 divisors (see below), whose sum is σ = 103532562000. Its totient is φ = 58702823424.

The previous prime is 79803944513. The next prime is 79803944557. The reversal of 79803944545 is 54544930897.

It can be written as a sum of positive squares in 8 ways, for example, as 4543703649 + 75260240896 = 67407^2 + 274336^2 .

It is a cyclic number.

It is not a de Polignac number, because 79803944545 - 2⁵ = 79803944513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79803944545.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2371920 + ... + 2405329.

It is an arithmetic number, because the mean of its divisors is an integer number (6470785125).

Almost surely, 2^79803944545 is an apocalyptic number.

It is an amenable number.

79803944545 is a deficient number, since it is larger than the sum of its proper divisors (23728617455).

79803944545 is a wasteful number, since it uses less digits than its factorization.

79803944545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777524.

The product of its (nonzero) digits is 21772800, while the sum is 58.

The spelling of 79803944545 in words is "seventy-nine billion, eight hundred three million, nine hundred forty-four thousand, five hundred forty-five".