126503866069 has 4 divisors (see below), whose sum is σ = 144575846944. Its totient is φ = 108431885196.

The previous prime is 126503866061. The next prime is 126503866087. The reversal of 126503866069 is 960668305621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126503866069 - 2³ = 126503866061 is a prime.

It is a super-2 number, since 2×126503866069² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126503866061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9035990427 + ... + 9035990440.

It is an arithmetic number, because the mean of its divisors is an integer number (36143961736).

Almost surely, 2^126503866069 is an apocalyptic number.

It is an amenable number.

126503866069 is a deficient number, since it is larger than the sum of its proper divisors (18071980875).

126503866069 is an equidigital number, since it uses as much as digits as its factorization.

126503866069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18071980874.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 126503866069 in words is "one hundred twenty-six billion, five hundred three million, eight hundred sixty-six thousand, sixty-nine".