5401668491 has 2 divisors, whose sum is σ = 5401668492. Its totient is φ = 5401668490.

The previous prime is 5401668457. The next prime is 5401668509. The reversal of 5401668491 is 1948661045.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5401668491 - 2¹⁸ = 5401406347 is a prime.

It is not a weakly prime, because it can be changed into another prime (5401664491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2700834245 + 2700834246.

It is an arithmetic number, because the mean of its divisors is an integer number (2700834246).

Almost surely, 2^5401668491 is an apocalyptic number.

5401668491 is a deficient number, since it is larger than the sum of its proper divisors (1).

5401668491 is an equidigital number, since it uses as much as digits as its factorization.

5401668491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 5401668491 is about 73496.0440500031. The cubic root of 5401668491 is about 1754.5913168127.

The spelling of 5401668491 in words is "five billion, four hundred one million, six hundred sixty-eight thousand, four hundred ninety-one".