6490185887 has 2 divisors, whose sum is σ = 6490185888. Its totient is φ = 6490185886.

The previous prime is 6490185881. The next prime is 6490185941. The reversal of 6490185887 is 7885810946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6490185887 - 2¹⁴ = 6490169503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6490185881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245092943 + 3245092944.

It is an arithmetic number, because the mean of its divisors is an integer number (3245092944).

Almost surely, 2^6490185887 is an apocalyptic number.

6490185887 is a deficient number, since it is larger than the sum of its proper divisors (1).

6490185887 is an equidigital number, since it uses as much as digits as its factorization.

6490185887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 56.

The square root of 6490185887 is about 80561.6899462766. The cubic root of 6490185887 is about 1865.3158415412.

The spelling of 6490185887 in words is "six billion, four hundred ninety million, one hundred eighty-five thousand, eight hundred eighty-seven".