1606763865 has 16 divisors (see below), whose sum is σ = 2938082688. Its totient is φ = 734520576.

The previous prime is 1606763839. The next prime is 1606763881. The reversal of 1606763865 is 5683676061.

It is not a de Polignac number, because 1606763865 - 2¹⁰ = 1606762841 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7651152 + ... + 7651361.

It is an arithmetic number, because the mean of its divisors is an integer number (183630168).

Almost surely, 2^1606763865 is an apocalyptic number.

1606763865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1606763865 is a deficient number, since it is larger than the sum of its proper divisors (1331318823).

1606763865 is a wasteful number, since it uses less digits than its factorization.

1606763865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15302528.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 1606763865 is about 40084.4591456589. The cubic root of 1606763865 is about 1171.2529167054.

The spelling of 1606763865 in words is "one billion, six hundred six million, seven hundred sixty-three thousand, eight hundred sixty-five".