7170820478863 has 4 divisors (see below), whose sum is σ = 7241818701528. Its totient is φ = 7099822256200.

The previous prime is 7170820478851. The next prime is 7170820478891. The reversal of 7170820478863 is 3688740280717.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7170820478863 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 (7170820478813) 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, 35499111181 + ... + 35499111382.

It is an arithmetic number, because the mean of its divisors is an integer number (1810454675382).

Almost surely, 2^{7170820478863} is an apocalyptic number.

7170820478863 is a deficient number, since it is larger than the sum of its proper divisors (70998222665).

7170820478863 is a wasteful number, since it uses less digits than its factorization.

7170820478863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70998222664.

The product of its (nonzero) digits is 25288704, while the sum is 61.

The spelling of 7170820478863 in words is "seven trillion, one hundred seventy billion, eight hundred twenty million, four hundred seventy-eight thousand, eight hundred sixty-three".