12820478589446 has 64 divisors (see below), whose sum is σ = 21803663185920. Its totient is φ = 5601107232000.

The previous prime is 12820478589431. The next prime is 12820478589533. The reversal of 12820478589446 is 64498587402821.

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 31 ways as a sum of consecutive naturals, for example, 58725140 + ... + 58943048.

It is an arithmetic number, because the mean of its divisors is an integer number (340682237280).

Almost surely, 2^{12820478589446} is an apocalyptic number.

12820478589446 is a deficient number, since it is larger than the sum of its proper divisors (8983184596474).

12820478589446 is a wasteful number, since it uses less digits than its factorization.

12820478589446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218541.

The product of its (nonzero) digits is 247726080, while the sum is 68.

The spelling of 12820478589446 in words is "twelve trillion, eight hundred twenty billion, four hundred seventy-eight million, five hundred eighty-nine thousand, four hundred forty-six".