12643601255446 has 16 divisors (see below), whose sum is σ = 21889346447520. Its totient is φ = 5365035892800.

The previous prime is 12643601255431. The next prime is 12643601255459. The reversal of 12643601255446 is 64455210634621.

It is a self number, because there is not a number n which added to its sum of digits gives 12643601255446.

It is a congruent number.

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, 4470861831 + ... + 4470864658.

It is an arithmetic number, because the mean of its divisors is an integer number (1368084152970).

Almost surely, 2^{12643601255446} is an apocalyptic number.

12643601255446 is a deficient number, since it is larger than the sum of its proper divisors (9245745192074).

12643601255446 is a wasteful number, since it uses less digits than its factorization.

12643601255446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8941726599.

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 12643601255446 in words is "twelve trillion, six hundred forty-three billion, six hundred one million, two hundred fifty-five thousand, four hundred forty-six".