12640425235 has 8 divisors (see below), whose sum is σ = 15175708416. Its totient is φ = 10107541440.

The previous prime is 12640425209. The next prime is 12640425247. The reversal of 12640425235 is 53252404621.

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

It is not a de Polignac number, because 12640425235 - 2¹³ = 12640417043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12640425235.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588234 + ... + 609343.

It is an arithmetic number, because the mean of its divisors is an integer number (1896963552).

Almost surely, 2^12640425235 is an apocalyptic number.

12640425235 is a deficient number, since it is larger than the sum of its proper divisors (2535283181).

12640425235 is a wasteful number, since it uses less digits than its factorization.

12640425235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199693.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 12640425235 its reverse (53252404621), we get a palindrome (65892829856).

The spelling of 12640425235 in words is "twelve billion, six hundred forty million, four hundred twenty-five thousand, two hundred thirty-five".