12640214546 has 4 divisors (see below), whose sum is σ = 18960321822. Its totient is φ = 6320107272.

The previous prime is 12640214533. The next prime is 12640214557. The reversal of 12640214546 is 64541204621.

12640214546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9536499025 + 3103715521 = 97655^2 + 55711^2 .

It is a super-2 number, since 2×12640214546² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3160053635 + ... + 3160053638.

Almost surely, 2^12640214546 is an apocalyptic number.

12640214546 is a deficient number, since it is larger than the sum of its proper divisors (6320107276).

12640214546 is an equidigital number, since it uses as much as digits as its factorization.

12640214546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6320107275.

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 12640214546 in words is "twelve billion, six hundred forty million, two hundred fourteen thousand, five hundred forty-six".