6469145777 has 2 divisors, whose sum is σ = 6469145778. Its totient is φ = 6469145776.

The previous prime is 6469145747. The next prime is 6469145791. The reversal of 6469145777 is 7775419646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6469145761 + 16 = 80431^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 6469145777 - 2¹⁸ = 6468883633 is a prime.

It is not a weakly prime, because it can be changed into another prime (6469145717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3234572888 + 3234572889.

It is an arithmetic number, because the mean of its divisors is an integer number (3234572889).

Almost surely, 2^6469145777 is an apocalyptic number.

It is an amenable number.

6469145777 is a deficient number, since it is larger than the sum of its proper divisors (1).

6469145777 is an equidigital number, since it uses as much as digits as its factorization.

6469145777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8890560, while the sum is 56.

The square root of 6469145777 is about 80431.0000994641. Note that the first 4 decimals coincide. The cubic root of 6469145777 is about 1863.2979775493.

The spelling of 6469145777 in words is "six billion, four hundred sixty-nine million, one hundred forty-five thousand, seven hundred seventy-seven".