1630280961 has 12 divisors (see below), whose sum is σ = 2357447040. Its totient is φ = 1085655480.

The previous prime is 1630280947. The next prime is 1630281017. The reversal of 1630280961 is 1690820361.

It is not a de Polignac number, because 1630280961 - 2¹³ = 1630272769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1630280461) 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 11 ways as a sum of consecutive naturals, for example, 91221 + ... + 107618.

It is an arithmetic number, because the mean of its divisors is an integer number (196453920).

Almost surely, 2^1630280961 is an apocalyptic number.

It is an amenable number.

1630280961 is a deficient number, since it is larger than the sum of its proper divisors (727166079).

1630280961 is a wasteful number, since it uses less digits than its factorization.

1630280961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199756 (or 199753 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1630280961 is about 40376.7378697190. The cubic root of 1630280961 is about 1176.9395366471.

The spelling of 1630280961 in words is "one billion, six hundred thirty million, two hundred eighty thousand, nine hundred sixty-one".