123006640063 has 4 divisors (see below), whose sum is σ = 123169133080. Its totient is φ = 122844147048.

The previous prime is 123006640021. The next prime is 123006640139. The reversal of 123006640063 is 360046600321.

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 123006640063 - 2³³ = 114416705471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123006640363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81245373 + ... + 81246886.

It is an arithmetic number, because the mean of its divisors is an integer number (30792283270).

Almost surely, 2^123006640063 is an apocalyptic number.

123006640063 is a deficient number, since it is larger than the sum of its proper divisors (162493017).

123006640063 is an equidigital number, since it uses as much as digits as its factorization.

123006640063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162493016.

The product of its (nonzero) digits is 15552, while the sum is 31.

It can be divided in two parts, 1230066 and 40063, that added together give a square (1270129 = 1127²).

The spelling of 123006640063 in words is "one hundred twenty-three billion, six million, six hundred forty thousand, sixty-three".