8147253645 has 32 divisors (see below), whose sum is σ = 14820854400. Its totient is φ = 4244147712.

The previous prime is 8147253641. The next prime is 8147253659. The reversal of 8147253645 is 5463527418.

8147253645 is a `hidden beast` number, since 8 + 1 + 4 + 72 + 536 + 45 = 666.

It is not a de Polignac number, because 8147253645 - 2² = 8147253641 is a prime.

It is a super-3 number, since 3×8147253645³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8147253645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8147253641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 695940 + ... + 707549.

It is an arithmetic number, because the mean of its divisors is an integer number (463151700).

Almost surely, 2^8147253645 is an apocalyptic number.

It is an amenable number.

8147253645 is a deficient number, since it is larger than the sum of its proper divisors (6673600755).

8147253645 is a wasteful number, since it uses less digits than its factorization.

8147253645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403546 (or 1403540 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 8147253645 is about 90262.1384911747. The cubic root of 8147253645 is about 2012.1966072744.

The spelling of 8147253645 in words is "eight billion, one hundred forty-seven million, two hundred fifty-three thousand, six hundred forty-five".