126808550817 has 32 divisors (see below), whose sum is σ = 185049317376. Its totient is φ = 76769985600.

The previous prime is 126808550797. The next prime is 126808550833. The reversal of 126808550817 is 718055808621.

It is not a de Polignac number, because 126808550817 - 2⁷ = 126808550689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126808550817.

It is not an unprimeable number, because it can be changed into a prime (126808550117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1232592 + ... + 1331502.

It is an arithmetic number, because the mean of its divisors is an integer number (5782791168).

Almost surely, 2^126808550817 is an apocalyptic number.

It is an amenable number.

126808550817 is a deficient number, since it is larger than the sum of its proper divisors (58240766559).

126808550817 is a wasteful number, since it uses less digits than its factorization.

126808550817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99461.

The product of its (nonzero) digits is 1075200, while the sum is 51.

The spelling of 126808550817 in words is "one hundred twenty-six billion, eight hundred eight million, five hundred fifty thousand, eight hundred seventeen".