2640663016123 has 8 divisors (see below), whose sum is σ = 2885094653760. Its totient is φ = 2396959939080.

The previous prime is 2640663016091. The next prime is 2640663016157. The reversal of 2640663016123 is 3216103660462.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2640663016123 - 2⁵ = 2640663016091 is a prime.

It is a super-2 number, since 2×2640663016123² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2640663011123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182132565 + ... + 182147062.

It is an arithmetic number, because the mean of its divisors is an integer number (360636831720).

Almost surely, 2^{2640663016123} is an apocalyptic number.

2640663016123 is a deficient number, since it is larger than the sum of its proper divisors (244431637637).

2640663016123 is a wasteful number, since it uses less digits than its factorization.

2640663016123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364280297.

The product of its (nonzero) digits is 186624, while the sum is 40.

Adding to 2640663016123 its reverse (3216103660462), we get a palindrome (5856766676585).

The spelling of 2640663016123 in words is "two trillion, six hundred forty billion, six hundred sixty-three million, sixteen thousand, one hundred twenty-three".