14978505969397 has 4 divisors (see below), whose sum is σ = 14978981252556. Its totient is φ = 14978030686240.

The previous prime is 14978505969319. The next prime is 14978505969403. The reversal of 14978505969397 is 79396950587941.

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 5661396838161 + 9317109131236 = 2379369^2 + 3052394^2 .

It is a cyclic number.

It is not a de Polignac number, because 14978505969397 - 2¹¹ = 14978505967349 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 14978505969397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14978505969197) 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, 237594304 + ... + 237657337.

It is an arithmetic number, because the mean of its divisors is an integer number (3744745313139).

Almost surely, 2^{14978505969397} is an apocalyptic number.

It is an amenable number.

14978505969397 is a deficient number, since it is larger than the sum of its proper divisors (475283159).

14978505969397 is an equidigital number, since it uses as much as digits as its factorization.

14978505969397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475283158.

The product of its (nonzero) digits is 4629441600, while the sum is 82.

The spelling of 14978505969397 in words is "fourteen trillion, nine hundred seventy-eight billion, five hundred five million, nine hundred sixty-nine thousand, three hundred ninety-seven".