126503005523 has 16 divisors (see below), whose sum is σ = 132702299136. Its totient is φ = 120471792000.

The previous prime is 126503005511. The next prime is 126503005547. The reversal of 126503005523 is 325500305621.

It is a cyclic number.

It is not a de Polignac number, because 126503005523 - 2¹⁰ = 126503004499 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 126503005523.

It is not an unprimeable number, because it can be changed into a prime (126503002523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412523 + ... + 650523.

It is an arithmetic number, because the mean of its divisors is an integer number (8293893696).

Almost surely, 2^126503005523 is an apocalyptic number.

126503005523 is a deficient number, since it is larger than the sum of its proper divisors (6199293613).

126503005523 is a wasteful number, since it uses less digits than its factorization.

126503005523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238354.

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 126503005523 in words is "one hundred twenty-six billion, five hundred three million, five thousand, five hundred twenty-three".