126322665563 has 4 divisors (see below), whose sum is σ = 126704305368. Its totient is φ = 125941025760.

The previous prime is 126322665541. The next prime is 126322665617. The reversal of 126322665563 is 365566223621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126322665563 - 2¹⁰ = 126322664539 is a prime.

It is a super-2 number, since 2×126322665563² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126322665523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190819406 + ... + 190820067.

It is an arithmetic number, because the mean of its divisors is an integer number (31676076342).

Almost surely, 2^126322665563 is an apocalyptic number.

126322665563 is a deficient number, since it is larger than the sum of its proper divisors (381639805).

126322665563 is an equidigital number, since it uses as much as digits as its factorization.

126322665563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381639804.

The product of its digits is 2332800, while the sum is 47.

The spelling of 126322665563 in words is "one hundred twenty-six billion, three hundred twenty-two million, six hundred sixty-five thousand, five hundred sixty-three".