126723603543 has 4 divisors (see below), whose sum is σ = 168964804728. Its totient is φ = 84482402360.

The previous prime is 126723603541. The next prime is 126723603551. The reversal of 126723603543 is 345306327621.

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 126723603543 - 2¹ = 126723603541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126723603495 and 126723603504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126723603541) 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, 21120600588 + ... + 21120600593.

It is an arithmetic number, because the mean of its divisors is an integer number (42241201182).

Almost surely, 2^126723603543 is an apocalyptic number.

126723603543 is a deficient number, since it is larger than the sum of its proper divisors (42241201185).

126723603543 is an equidigital number, since it uses as much as digits as its factorization.

126723603543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42241201184.

The product of its (nonzero) digits is 544320, while the sum is 42.

The spelling of 126723603543 in words is "one hundred twenty-six billion, seven hundred twenty-three million, six hundred three thousand, five hundred forty-three".