126388751209 has 8 divisors (see below), whose sum is σ = 144572236160. Its totient is φ = 108237253536.

The previous prime is 126388751197. The next prime is 126388751233. The reversal of 126388751209 is 902157883621.

It is a happy number.

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 126388751209 - 2⁷ = 126388751081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126388751009) 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, 7988349 + ... + 8004154.

It is an arithmetic number, because the mean of its divisors is an integer number (18071529520).

Almost surely, 2^126388751209 is an apocalyptic number.

It is an amenable number.

126388751209 is a deficient number, since it is larger than the sum of its proper divisors (18183484951).

126388751209 is a wasteful number, since it uses less digits than its factorization.

126388751209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15993639.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 126388751209 in words is "one hundred twenty-six billion, three hundred eighty-eight million, seven hundred fifty-one thousand, two hundred nine".