12723157205 has 16 divisors (see below), whose sum is σ = 16698614400. Its totient is φ = 9229402560.

The previous prime is 12723157199. The next prime is 12723157241. The reversal of 12723157205 is 50275132721.

It is not a de Polignac number, because 12723157205 - 2¹⁸ = 12722895061 is a prime.

It is a congruent number.

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, 275945 + ... + 318734.

It is an arithmetic number, because the mean of its divisors is an integer number (1043663400).

Almost surely, 2^12723157205 is an apocalyptic number.

It is an amenable number.

12723157205 is a deficient number, since it is larger than the sum of its proper divisors (3975457195).

12723157205 is a wasteful number, since it uses less digits than its factorization.

12723157205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595084.

The product of its (nonzero) digits is 29400, while the sum is 35.

Adding to 12723157205 its reverse (50275132721), we get a palindrome (62998289926).

The spelling of 12723157205 in words is "twelve billion, seven hundred twenty-three million, one hundred fifty-seven thousand, two hundred five".