12640322034 has 48 divisors (see below), whose sum is σ = 28428716160. Its totient is φ = 4056173280.

The previous prime is 12640321963. The next prime is 12640322047. The reversal of 12640322034 is 43022304621.

12640322034 is a `hidden beast` number, since 1 + 2 + 6 + 403 + 220 + 34 = 666.

It is a super-2 number, since 2×12640322034² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12640321989 and 12640322007.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70864 + ... + 174075.

It is an arithmetic number, because the mean of its divisors is an integer number (592264920).

Almost surely, 2^12640322034 is an apocalyptic number.

12640322034 is an abundant number, since it is smaller than the sum of its proper divisors (15788394126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12640322034 is a wasteful number, since it uses less digits than its factorization.

12640322034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245055 (or 245052 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 12640322034 its reverse (43022304621), we get a palindrome (55662626655).

The spelling of 12640322034 in words is "twelve billion, six hundred forty million, three hundred twenty-two thousand, thirty-four".