1608128631 has 12 divisors (see below), whose sum is σ = 2445108120. Its totient is φ = 1015660080.

The previous prime is 1608128611. The next prime is 1608128657. The reversal of 1608128631 is 1368218061.

1608128631 is a `hidden beast` number, since 1 + 6 + 0 + 8 + 12 + 8 + 631 = 666.

It is not a de Polignac number, because 1608128631 - 2⁶ = 1608128567 is a prime.

It is a super-2 number, since 2×1608128631² = 5172155387683868322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1608128611) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4701960 + ... + 4702301.

It is an arithmetic number, because the mean of its divisors is an integer number (203759010).

Almost surely, 2^1608128631 is an apocalyptic number.

1608128631 is a deficient number, since it is larger than the sum of its proper divisors (836979489).

1608128631 is a wasteful number, since it uses less digits than its factorization.

1608128631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9404286 (or 9404283 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1608128631 is about 40101.4791622454. The cubic root of 1608128631 is about 1171.5844389301.

The spelling of 1608128631 in words is "one billion, six hundred eight million, one hundred twenty-eight thousand, six hundred thirty-one".