2091000451641 has 4 divisors (see below), whose sum is σ = 2788000602192. Its totient is φ = 1394000301092.

The previous prime is 2091000451637. The next prime is 2091000451693. The reversal of 2091000451641 is 1461540001902.

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 2091000451641 - 2² = 2091000451637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2091000451541) 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, 348500075271 + ... + 348500075276.

It is an arithmetic number, because the mean of its divisors is an integer number (697000150548).

Almost surely, 2^{2091000451641} is an apocalyptic number.

It is an amenable number.

2091000451641 is a deficient number, since it is larger than the sum of its proper divisors (697000150551).

2091000451641 is an equidigital number, since it uses as much as digits as its factorization.

2091000451641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697000150550.

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 2091000451641 in words is "two trillion, ninety-one billion, four hundred fifty-one thousand, six hundred forty-one".