126387638749 has 8 divisors (see below), whose sum is σ = 126930897792. Its totient is φ = 125845268640.

The previous prime is 126387638743. The next prime is 126387638777. The reversal of 126387638749 is 947836783621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126387638749 - 2⁷ = 126387638621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126387638743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63522 + ... + 506764.

It is an arithmetic number, because the mean of its divisors is an integer number (15866362224).

Almost surely, 2^126387638749 is an apocalyptic number.

It is an amenable number.

126387638749 is a deficient number, since it is larger than the sum of its proper divisors (543259043).

126387638749 is an equidigital number, since it uses as much as digits as its factorization.

126387638749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444467.

The product of its digits is 73156608, while the sum is 64.

The spelling of 126387638749 in words is "one hundred twenty-six billion, three hundred eighty-seven million, six hundred thirty-eight thousand, seven hundred forty-nine".