12640213446 has 32 divisors (see below), whose sum is σ = 28994761728. Its totient is φ = 3598633920.

The previous prime is 12640213433. The next prime is 12640213493. The reversal of 12640213446 is 64431204621.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 523710 + ... + 547313.

It is an arithmetic number, because the mean of its divisors is an integer number (906086304).

Almost surely, 2^12640213446 is an apocalyptic number.

12640213446 is an abundant number, since it is smaller than the sum of its proper divisors (16354548282).

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

12640213446 is a wasteful number, since it uses less digits than its factorization.

12640213446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071316.

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 12640213446 in words is "twelve billion, six hundred forty million, two hundred thirteen thousand, four hundred forty-six".