2402806020217 has 4 divisors (see below), whose sum is σ = 2544147550836. Its totient is φ = 2261464489600.

The previous prime is 2402806020161. The next prime is 2402806020233. The reversal of 2402806020217 is 7120206082042.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1087371358441 + 1315434661776 = 1042771^2 + 1146924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2402806020217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2402806020617) 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, 70670765284 + ... + 70670765317.

It is an arithmetic number, because the mean of its divisors is an integer number (636036887709).

Almost surely, 2^{2402806020217} is an apocalyptic number.

It is an amenable number.

2402806020217 is a deficient number, since it is larger than the sum of its proper divisors (141341530619).

2402806020217 is a wasteful number, since it uses less digits than its factorization.

2402806020217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141341530618.

The product of its (nonzero) digits is 21504, while the sum is 34.

The spelling of 2402806020217 in words is "two trillion, four hundred two billion, eight hundred six million, twenty thousand, two hundred seventeen".