2645243235281 has 8 divisors (see below), whose sum is σ = 2834855265984. Its totient is φ = 2461847992560.

The previous prime is 2645243235277. The next prime is 2645243235289. The reversal of 2645243235281 is 1825323425462.

2645243235281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2645243235281 - 2² = 2645243235277 is a prime.

It is a super-2 number, since 2×2645243235281² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2645243235289) 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, 1554196115 + ... + 1554197816.

It is an arithmetic number, because the mean of its divisors is an integer number (354356908248).

Almost surely, 2^{2645243235281} is an apocalyptic number.

It is an amenable number.

2645243235281 is a deficient number, since it is larger than the sum of its proper divisors (189612030703).

2645243235281 is a wasteful number, since it uses less digits than its factorization.

2645243235281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108393991.

The product of its digits is 2764800, while the sum is 47.

The spelling of 2645243235281 in words is "two trillion, six hundred forty-five billion, two hundred forty-three million, two hundred thirty-five thousand, two hundred eighty-one".