8207644957 has 4 divisors (see below), whose sum is σ = 8236647520. Its totient is φ = 8178642396.

The previous prime is 8207644891. The next prime is 8207644969. The reversal of 8207644957 is 7594467028.

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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8207644957 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 (8207644457) 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 3 ways as a sum of consecutive naturals, for example, 14500857 + ... + 14501422.

It is an arithmetic number, because the mean of its divisors is an integer number (2059161880).

Almost surely, 2^8207644957 is an apocalyptic number.

It is an amenable number.

8207644957 is a deficient number, since it is larger than the sum of its proper divisors (29002563).

8207644957 is a wasteful number, since it uses less digits than its factorization.

8207644957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29002562.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The square root of 8207644957 is about 90596.0537606357. The cubic root of 8207644957 is about 2017.1561587225.

The spelling of 8207644957 in words is "eight billion, two hundred seven million, six hundred forty-four thousand, nine hundred fifty-seven".