126549497909 has 8 divisors (see below), whose sum is σ = 132058577472. Its totient is φ = 121040995680.

The previous prime is 126549497843. The next prime is 126549497927. The reversal of 126549497909 is 909794945621.

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 126549497909 - 2⁸ = 126549497653 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 (126549491909) 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 in 7 ways as a sum of consecutive naturals, for example, 337922 + ... + 606044.

It is an arithmetic number, because the mean of its divisors is an integer number (16507322184).

Almost surely, 2^126549497909 is an apocalyptic number.

It is an amenable number.

126549497909 is a deficient number, since it is larger than the sum of its proper divisors (5509079563).

126549497909 is a wasteful number, since it uses less digits than its factorization.

126549497909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288667.

The product of its (nonzero) digits is 44089920, while the sum is 65.

The spelling of 126549497909 in words is "one hundred twenty-six billion, five hundred forty-nine million, four hundred ninety-seven thousand, nine hundred nine".