126287656553 has 16 divisors (see below), whose sum is σ = 127917058896. Its totient is φ = 124668149760.

The previous prime is 126287656519. The next prime is 126287656597. The reversal of 126287656553 is 355656782621.

It can be written as a sum of positive squares in 8 ways, for example, as 7308882064 + 118978774489 = 85492^2 + 344933^2 .

It is a cyclic number.

It is not a de Polignac number, because 126287656553 - 2²⁰ = 126286607977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126287656853) 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, 51734813 + ... + 51737253.

It is an arithmetic number, because the mean of its divisors is an integer number (7994816181).

Almost surely, 2^126287656553 is an apocalyptic number.

It is an amenable number.

126287656553 is a deficient number, since it is larger than the sum of its proper divisors (1629402343).

126287656553 is a wasteful number, since it uses less digits than its factorization.

126287656553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4204.

The product of its digits is 18144000, while the sum is 56.

The spelling of 126287656553 in words is "one hundred twenty-six billion, two hundred eighty-seven million, six hundred fifty-six thousand, five hundred fifty-three".