126656028685 has 16 divisors (see below), whose sum is σ = 157247251200. Its totient is φ = 97818993216.

The previous prime is 126656028637. The next prime is 126656028703. The reversal of 126656028685 is 586820656621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 126656028685 - 2²¹ = 126653931533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1257526 + ... + 1354504.

It is an arithmetic number, because the mean of its divisors is an integer number (9827953200).

Almost surely, 2^126656028685 is an apocalyptic number.

It is an amenable number.

126656028685 is a deficient number, since it is larger than the sum of its proper divisors (30591222515).

126656028685 is an equidigital number, since it uses as much as digits as its factorization.

126656028685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106020.

The product of its (nonzero) digits is 8294400, while the sum is 55.

It can be divided in two parts, 1266560 and 28685, that added together give a triangular number (1295245 = T₁₆₀₉).

The spelling of 126656028685 in words is "one hundred twenty-six billion, six hundred fifty-six million, twenty-eight thousand, six hundred eighty-five".