641118547 has 2 divisors, whose sum is σ = 641118548. Its totient is φ = 641118546.

The previous prime is 641118523. The next prime is 641118557. The reversal of 641118547 is 745811146.

641118547 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641118547 - 2¹⁹ = 640594259 is a prime.

It is a super-2 number, since 2×641118547² = 822065982614782418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641118557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320559273 + 320559274.

It is an arithmetic number, because the mean of its divisors is an integer number (320559274).

Almost surely, 2^641118547 is an apocalyptic number.

641118547 is a deficient number, since it is larger than the sum of its proper divisors (1).

641118547 is an equidigital number, since it uses as much as digits as its factorization.

641118547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 641118547 is about 25320.3188566021. The cubic root of 641118547 is about 862.2756330766.

The spelling of 641118547 in words is "six hundred forty-one million, one hundred eighteen thousand, five hundred forty-seven".