8257720550005 has 16 divisors (see below), whose sum is σ = 10120219211520. Its totient is φ = 6465543381952.

The previous prime is 8257720549993. The next prime is 8257720550011. The reversal of 8257720550005 is 5000550277528.

It is a cyclic number.

It is not a de Polignac number, because 8257720550005 - 2⁹ = 8257720549493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27918702 + ... + 28212928.

It is an arithmetic number, because the mean of its divisors is an integer number (632513700720).

Almost surely, 2^{8257720550005} is an apocalyptic number.

It is an amenable number.

8257720550005 is a deficient number, since it is larger than the sum of its proper divisors (1862498661515).

8257720550005 is a wasteful number, since it uses less digits than its factorization.

8257720550005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413708.

The product of its (nonzero) digits is 980000, while the sum is 46.

The spelling of 8257720550005 in words is "eight trillion, two hundred fifty-seven billion, seven hundred twenty million, five hundred fifty thousand, five".