2821681247641 has 4 divisors (see below), whose sum is σ = 2821711334400. Its totient is φ = 2821651160884.

The previous prime is 2821681247597. The next prime is 2821681247657. The reversal of 2821681247641 is 1467421861282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2821681247641 - 2²¹ = 2821679150489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2821681247141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14902261 + ... + 15090418.

It is an arithmetic number, because the mean of its divisors is an integer number (705427833600).

Almost surely, 2^{2821681247641} is an apocalyptic number.

It is an amenable number.

2821681247641 is a deficient number, since it is larger than the sum of its proper divisors (30086759).

2821681247641 is an equidigital number, since it uses as much as digits as its factorization.

2821681247641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30086758.

The product of its digits is 2064384, while the sum is 52.

The spelling of 2821681247641 in words is "two trillion, eight hundred twenty-one billion, six hundred eighty-one million, two hundred forty-seven thousand, six hundred forty-one".