126616809 has 16 divisors (see below), whose sum is σ = 184363200. Its totient is φ = 76656960.

The previous prime is 126616807. The next prime is 126616823. The reversal of 126616809 is 908616621.

It is not a de Polignac number, because 126616809 - 2¹ = 126616807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126616807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49879 + ... + 52355.

It is an arithmetic number, because the mean of its divisors is an integer number (11522700).

Almost surely, 2^126616809 is an apocalyptic number.

It is an amenable number.

126616809 is a deficient number, since it is larger than the sum of its proper divisors (57746391).

126616809 is a wasteful number, since it uses less digits than its factorization.

126616809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 126616809 is about 11252.4134744507. The cubic root of 126616809 is about 502.1465170754.

The spelling of 126616809 in words is "one hundred twenty-six million, six hundred sixteen thousand, eight hundred nine".