126161185313 has 4 divisors (see below), whose sum is σ = 127938103488. Its totient is φ = 124384267140.

The previous prime is 126161185309. The next prime is 126161185327. The reversal of 126161185313 is 313581161621.

It is a happy number.

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 126161185313 - 2² = 126161185309 is a prime.

It is a super-2 number, since 2×126161185313² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126161185373) 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, 888458981 + ... + 888459122.

It is an arithmetic number, because the mean of its divisors is an integer number (31984525872).

Almost surely, 2^126161185313 is an apocalyptic number.

It is an amenable number.

126161185313 is a deficient number, since it is larger than the sum of its proper divisors (1776918175).

126161185313 is an equidigital number, since it uses as much as digits as its factorization.

126161185313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776918174.

The product of its digits is 25920, while the sum is 38.

The spelling of 126161185313 in words is "one hundred twenty-six billion, one hundred sixty-one million, one hundred eighty-five thousand, three hundred thirteen".