126263380426 has 4 divisors (see below), whose sum is σ = 189395070642. Its totient is φ = 63131690212.

The previous prime is 126263380423. The next prime is 126263380471. The reversal of 126263380426 is 624083362621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 624083362621 = 39119 ⋅15953459.

It can be written as a sum of positive squares in only one way, i.e., 82728140625 + 43535239801 = 287625^2 + 208651^2 .

It is not an unprimeable number, because it can be changed into a prime (126263380423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31565845105 + ... + 31565845108.

Almost surely, 2^126263380426 is an apocalyptic number.

126263380426 is a deficient number, since it is larger than the sum of its proper divisors (63131690216).

126263380426 is an equidigital number, since it uses as much as digits as its factorization.

126263380426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63131690215.

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 126263380426 in words is "one hundred twenty-six billion, two hundred sixty-three million, three hundred eighty thousand, four hundred twenty-six".