813644545 has 8 divisors (see below), whose sum is σ = 1115855424. Its totient is φ = 557927664.

The previous prime is 813644539. The next prime is 813644551. The reversal of 813644545 is 545446318.

It is a happy number.

813644545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (813644539) and next prime (813644551).

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

It is not a de Polignac number, because 813644545 - 2⁷ = 813644417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 813644498 and 813644507.

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, 11623459 + ... + 11623528.

It is an arithmetic number, because the mean of its divisors is an integer number (139481928).

Almost surely, 2^813644545 is an apocalyptic number.

It is an amenable number.

813644545 is a deficient number, since it is larger than the sum of its proper divisors (302210879).

813644545 is a wasteful number, since it uses less digits than its factorization.

813644545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23246999.

The product of its digits is 230400, while the sum is 40.

The square root of 813644545 is about 28524.4552095215. The cubic root of 813644545 is about 933.5657402392.

The spelling of 813644545 in words is "eight hundred thirteen million, six hundred forty-four thousand, five hundred forty-five".