2821906342655 has 4 divisors (see below), whose sum is σ = 3386287611192. Its totient is φ = 2257525074120.

The previous prime is 2821906342583. The next prime is 2821906342669. The reversal of 2821906342655 is 5562436091282.

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

It is a de Polignac number, because none of the positive numbers 2^k-2821906342655 is a prime.

It is a super-4 number, since 4×2821906342655⁴ (a number of 51 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2821906342597 and 2821906342606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282190634261 + ... + 282190634270.

It is an arithmetic number, because the mean of its divisors is an integer number (846571902798).

Almost surely, 2^{2821906342655} is an apocalyptic number.

2821906342655 is a deficient number, since it is larger than the sum of its proper divisors (564381268537).

2821906342655 is an equidigital number, since it uses as much as digits as its factorization.

2821906342655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564381268536.

The product of its (nonzero) digits is 6220800, while the sum is 53.

The spelling of 2821906342655 in words is "two trillion, eight hundred twenty-one billion, nine hundred six million, three hundred forty-two thousand, six hundred fifty-five".