12645281551673 has 8 divisors (see below), whose sum is σ = 13105505659080. Its totient is φ = 12186669438720.

The previous prime is 12645281551663. The next prime is 12645281551687. The reversal of 12645281551673 is 37615518254621.

It can be written as a sum of positive squares in 4 ways, for example, as 940418941504 + 11704862610169 = 969752^2 + 3421237^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12645281551673 - 2¹⁶ = 12645281486137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12645281551663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402982640 + ... + 403014017.

It is an arithmetic number, because the mean of its divisors is an integer number (1638188207385).

Almost surely, 2^{12645281551673} is an apocalyptic number.

It is an amenable number.

12645281551673 is a deficient number, since it is larger than the sum of its proper divisors (460224107407).

12645281551673 is an equidigital number, since it uses as much as digits as its factorization.

12645281551673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805997227.

The product of its digits is 12096000, while the sum is 56.

The spelling of 12645281551673 in words is "twelve trillion, six hundred forty-five billion, two hundred eighty-one million, five hundred fifty-one thousand, six hundred seventy-three".