8645072653 has 4 divisors (see below), whose sum is σ = 9880083040. Its totient is φ = 7410062268.

The previous prime is 8645072647. The next prime is 8645072663. The reversal of 8645072653 is 3562705468.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-8645072653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8645072603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 617505183 + ... + 617505196.

It is an arithmetic number, because the mean of its divisors is an integer number (2470020760).

Almost surely, 2^8645072653 is an apocalyptic number.

It is an amenable number.

8645072653 is a deficient number, since it is larger than the sum of its proper divisors (1235010387).

8645072653 is a wasteful number, since it uses less digits than its factorization.

8645072653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235010386.

The product of its (nonzero) digits is 1209600, while the sum is 46.

The square root of 8645072653 is about 92978.8828336843. The cubic root of 8645072653 is about 2052.3726368272.

The spelling of 8645072653 in words is "eight billion, six hundred forty-five million, seventy-two thousand, six hundred fifty-three".