1630455809 has 8 divisors (see below), whose sum is σ = 1705079040. Its totient is φ = 1556143776.

The previous prime is 1630455793. The next prime is 1630455823. The reversal of 1630455809 is 9085540361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1630455809 - 2⁴ = 1630455793 is a prime.

It is a super-2 number, since 2×1630455809² = 5316772290203688962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1630455829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67049 + ... + 88070.

It is an arithmetic number, because the mean of its divisors is an integer number (213134880).

Almost surely, 2^1630455809 is an apocalyptic number.

It is an amenable number.

1630455809 is a deficient number, since it is larger than the sum of its proper divisors (74623231).

1630455809 is a wasteful number, since it uses less digits than its factorization.

1630455809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155599.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 1630455809 is about 40378.9030187795. The cubic root of 1630455809 is about 1176.9816108198.

The spelling of 1630455809 in words is "one billion, six hundred thirty million, four hundred fifty-five thousand, eight hundred nine".