12400561723 has 4 divisors (see below), whose sum is σ = 13527885528. Its totient is φ = 11273237920.

The previous prime is 12400561721. The next prime is 12400561769. The reversal of 12400561723 is 32716500421.

12400561723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12400561723 - 2¹ = 12400561721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12400561721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563661886 + ... + 563661907.

It is an arithmetic number, because the mean of its divisors is an integer number (3381971382).

Almost surely, 2^12400561723 is an apocalyptic number.

12400561723 is a deficient number, since it is larger than the sum of its proper divisors (1127323805).

12400561723 is a wasteful number, since it uses less digits than its factorization.

12400561723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127323804.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 12400561723 in words is "twelve billion, four hundred million, five hundred sixty-one thousand, seven hundred twenty-three".