2820202668749 has 4 divisors (see below), whose sum is σ = 2849276923164. Its totient is φ = 2791128414336.

The previous prime is 2820202668719. The next prime is 2820202668763. The reversal of 2820202668749 is 9478662020282.

It is a happy number.

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 1244128314025 + 1576074354724 = 1115405^2 + 1255418^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2820202668749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2820202668694 and 2820202668703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820202668719) 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, 14537127062 + ... + 14537127255.

It is an arithmetic number, because the mean of its divisors is an integer number (712319230791).

Almost surely, 2^{2820202668749} is an apocalyptic number.

It is an amenable number.

2820202668749 is a deficient number, since it is larger than the sum of its proper divisors (29074254415).

2820202668749 is an equidigital number, since it uses as much as digits as its factorization.

2820202668749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29074254414.

The product of its (nonzero) digits is 9289728, while the sum is 56.

The spelling of 2820202668749 in words is "two trillion, eight hundred twenty billion, two hundred two million, six hundred sixty-eight thousand, seven hundred forty-nine".