126404777607 has 4 divisors (see below), whose sum is σ = 168539703480. Its totient is φ = 84269851736.

The previous prime is 126404777599. The next prime is 126404777623. The reversal of 126404777607 is 706777404621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126404777607 - 2³ = 126404777599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126404777607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126404777687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21067462932 + ... + 21067462937.

It is an arithmetic number, because the mean of its divisors is an integer number (42134925870).

Almost surely, 2^126404777607 is an apocalyptic number.

126404777607 is a deficient number, since it is larger than the sum of its proper divisors (42134925873).

126404777607 is an equidigital number, since it uses as much as digits as its factorization.

126404777607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42134925872.

The product of its (nonzero) digits is 2765952, while the sum is 51.

The spelling of 126404777607 in words is "one hundred twenty-six billion, four hundred four million, seven hundred seventy-seven thousand, six hundred seven".