126406109623 has 4 divisors (see below), whose sum is σ = 128006187040. Its totient is φ = 124806032208.

The previous prime is 126406109597. The next prime is 126406109657. The reversal of 126406109623 is 326901604621.

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 126406109623 - 2²⁵ = 126372555191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126406109693) 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, 800038590 + ... + 800038747.

It is an arithmetic number, because the mean of its divisors is an integer number (32001546760).

Almost surely, 2^126406109623 is an apocalyptic number.

126406109623 is a deficient number, since it is larger than the sum of its proper divisors (1600077417).

126406109623 is an equidigital number, since it uses as much as digits as its factorization.

126406109623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600077416.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 126406109623 in words is "one hundred twenty-six billion, four hundred six million, one hundred nine thousand, six hundred twenty-three".