2081454491 has 2 divisors, whose sum is σ = 2081454492. Its totient is φ = 2081454490.

The previous prime is 2081454469. The next prime is 2081454521. The reversal of 2081454491 is 1944541802.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2081454491 is a prime.

It is not a weakly prime, because it can be changed into another prime (2081454461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040727245 + 1040727246.

It is an arithmetic number, because the mean of its divisors is an integer number (1040727246).

Almost surely, 2^2081454491 is an apocalyptic number.

2081454491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2081454491 is an equidigital number, since it uses as much as digits as its factorization.

2081454491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 2081454491 is about 45622.9601297417. The cubic root of 2081454491 is about 1276.7983319529.

The spelling of 2081454491 in words is "two billion, eighty-one million, four hundred fifty-four thousand, four hundred ninety-one".