1630455805 has 16 divisors (see below), whose sum is σ = 2259969984. Its totient is φ = 1116033280.

The previous prime is 1630455793. The next prime is 1630455823. The reversal of 1630455805 is 5085540361.

It is not a de Polignac number, because 1630455805 - 2⁵ = 1630455773 is a prime.

It is a super-2 number, since 2×1630455805² = 5316772264116396050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 870967 + ... + 872836.

It is an arithmetic number, because the mean of its divisors is an integer number (141248124).

Almost surely, 2^1630455805 is an apocalyptic number.

It is an amenable number.

1630455805 is a deficient number, since it is larger than the sum of its proper divisors (629514179).

1630455805 is a wasteful number, since it uses less digits than its factorization.

1630455805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743836.

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 1630455805 is about 40378.9029692487. The cubic root of 1630455805 is about 1176.9816098573.

The spelling of 1630455805 in words is "one billion, six hundred thirty million, four hundred fifty-five thousand, eight hundred five".