868452609445 has 32 divisors (see below), whose sum is σ = 1089542008800. Its totient is φ = 663676747776.

The previous prime is 868452609413. The next prime is 868452609469. The reversal of 868452609445 is 544906254868.

868452609445 = 658958² + 658959².

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 516289284 + 867936320161 = 22722^2 + 931631^2 .

It is a 10-Lehmer number, since φ(868452609445) divides (868452609445-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 868452609445 - 2⁵ = 868452609413 is a prime.

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, 54690847 + ... + 54706723.

It is an arithmetic number, because the mean of its divisors is an integer number (34048187775).

Almost surely, 2^868452609445 is an apocalyptic number.

868452609445 is the 658959-th centered square number.

It is an amenable number.

868452609445 is a deficient number, since it is larger than the sum of its proper divisors (221089399355).

868452609445 is a wasteful number, since it uses less digits than its factorization.

868452609445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19897.

The product of its (nonzero) digits is 66355200, while the sum is 61.

The spelling of 868452609445 in words is "eight hundred sixty-eight billion, four hundred fifty-two million, six hundred nine thousand, four hundred forty-five".