12640173051 has 8 divisors (see below), whose sum is σ = 18385706304. Its totient is φ = 7660710920.

The previous prime is 12640173019. The next prime is 12640173061. The reversal of 12640173051 is 15037104621.

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 12640173051 - 2⁵ = 12640173019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12640173001) 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 7 ways as a sum of consecutive naturals, for example, 191517741 + ... + 191517806.

It is an arithmetic number, because the mean of its divisors is an integer number (2298213288).

Almost surely, 2^12640173051 is an apocalyptic number.

12640173051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12640173051 is a deficient number, since it is larger than the sum of its proper divisors (5745533253).

12640173051 is a wasteful number, since it uses less digits than its factorization.

12640173051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383035561.

The product of its (nonzero) digits is 5040, while the sum is 30.

Adding to 12640173051 its reverse (15037104621), we get a palindrome (27677277672).

The spelling of 12640173051 in words is "twelve billion, six hundred forty million, one hundred seventy-three thousand, fifty-one".