126780906765 has 16 divisors (see below), whose sum is σ = 204710457600. Its totient is φ = 66996148032.

The previous prime is 126780906731. The next prime is 126780906779. The reversal of 126780906765 is 567609087621.

It is not a de Polignac number, because 126780906765 - 2⁶ = 126780906701 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 38769285 + ... + 38772554.

It is an arithmetic number, because the mean of its divisors is an integer number (12794403600).

Almost surely, 2^126780906765 is an apocalyptic number.

126780906765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126780906765 is a deficient number, since it is larger than the sum of its proper divisors (77929550835).

126780906765 is a wasteful number, since it uses less digits than its factorization.

126780906765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77541956.

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 126780906765 in words is "one hundred twenty-six billion, seven hundred eighty million, nine hundred six thousand, seven hundred sixty-five".