126656028687 has 16 divisors (see below), whose sum is σ = 181545039360. Its totient is φ = 78291294912.

The previous prime is 126656028637. The next prime is 126656028703. The reversal of 126656028687 is 786820656621.

It is not a de Polignac number, because 126656028687 - 2¹⁵ = 126655995919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126656028637) by changing a digit.

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, 23635998 + ... + 23641355.

It is an arithmetic number, because the mean of its divisors is an integer number (11346564960).

Almost surely, 2^126656028687 is an apocalyptic number.

126656028687 is a deficient number, since it is larger than the sum of its proper divisors (54889010673).

126656028687 is a wasteful number, since it uses less digits than its factorization.

126656028687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47277422.

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 126656028687 in words is "one hundred twenty-six billion, six hundred fifty-six million, twenty-eight thousand, six hundred eighty-seven".