126781759783 has 16 divisors (see below), whose sum is σ = 146024879616. Its totient is φ = 107821789920.

The previous prime is 126781759721. The next prime is 126781759801. The reversal of 126781759783 is 387957187621.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126781759783 is a prime.

It is a super-2 number, since 2×126781759783² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126781759283) 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, 8734510 + ... + 8749012.

It is an arithmetic number, because the mean of its divisors is an integer number (9126554976).

Almost surely, 2^126781759783 is an apocalyptic number.

126781759783 is a deficient number, since it is larger than the sum of its proper divisors (19243119833).

126781759783 is a wasteful number, since it uses less digits than its factorization.

126781759783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24174.

The product of its digits is 35562240, while the sum is 64.

The spelling of 126781759783 in words is "one hundred twenty-six billion, seven hundred eighty-one million, seven hundred fifty-nine thousand, seven hundred eighty-three".