126213658853 has 4 divisors (see below), whose sum is σ = 129624838860. Its totient is φ = 122802478848.

The previous prime is 126213658847. The next prime is 126213658889. The reversal of 126213658853 is 358856312621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 90605214049 + 35608444804 = 301007^2 + 188702^2 .

It is a cyclic number.

It is not a de Polignac number, because 126213658853 - 2¹⁸ = 126213396709 is a prime.

It is a super-2 number, since 2×126213658853² (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 (126213658553) 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, 1705589948 + ... + 1705590021.

It is an arithmetic number, because the mean of its divisors is an integer number (32406209715).

Almost surely, 2^126213658853 is an apocalyptic number.

It is an amenable number.

126213658853 is a deficient number, since it is larger than the sum of its proper divisors (3411180007).

126213658853 is an equidigital number, since it uses as much as digits as its factorization.

126213658853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3411180006.

The product of its digits is 2073600, while the sum is 50.

The spelling of 126213658853 in words is "one hundred twenty-six billion, two hundred thirteen million, six hundred fifty-eight thousand, eight hundred fifty-three".