6849401563 has 2 divisors, whose sum is σ = 6849401564. Its totient is φ = 6849401562.

The previous prime is 6849401551. The next prime is 6849401621. The reversal of 6849401563 is 3651049486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6849401563 - 2²¹ = 6847304411 is a prime.

It is not a weakly prime, because it can be changed into another prime (6849401963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3424700781 + 3424700782.

It is an arithmetic number, because the mean of its divisors is an integer number (3424700782).

Almost surely, 2^6849401563 is an apocalyptic number.

6849401563 is a deficient number, since it is larger than the sum of its proper divisors (1).

6849401563 is an equidigital number, since it uses as much as digits as its factorization.

6849401563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 6849401563 is about 82761.1114171384. Note that the first 3 decimals coincide. The cubic root of 6849401563 is about 1899.1133039877.

The spelling of 6849401563 in words is "six billion, eight hundred forty-nine million, four hundred one thousand, five hundred sixty-three".