126301756381 has 4 divisors (see below), whose sum is σ = 126316681792. Its totient is φ = 126286830972.

The previous prime is 126301756351. The next prime is 126301756387. The reversal of 126301756381 is 183657103621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 183657103621 = 12373 ⋅14843377.

It is a cyclic number.

It is not a de Polignac number, because 126301756381 - 2⁵ = 126301756349 is a prime.

It is a super-2 number, since 2×126301756381² (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 (126301756387) 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, 7450005 + ... + 7466938.

It is an arithmetic number, because the mean of its divisors is an integer number (31579170448).

Almost surely, 2^126301756381 is an apocalyptic number.

It is an amenable number.

126301756381 is a deficient number, since it is larger than the sum of its proper divisors (14925411).

126301756381 is an equidigital number, since it uses as much as digits as its factorization.

126301756381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14925410.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 126301756381 in words is "one hundred twenty-six billion, three hundred one million, seven hundred fifty-six thousand, three hundred eighty-one".