1609658955 has 24 divisors (see below), whose sum is σ = 2793325392. Its totient is φ = 857484864.

The previous prime is 1609658927. The next prime is 1609658959. The reversal of 1609658955 is 5598569061.

1609658955 is a `hidden beast` number, since 1 + 6 + 0 + 9 + 6 + 589 + 55 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1609658955 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1609658959) 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 23 ways as a sum of consecutive naturals, for example, 19072 + ... + 59858.

It is an arithmetic number, because the mean of its divisors is an integer number (116388558).

Almost surely, 2^1609658955 is an apocalyptic number.

1609658955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1609658955 is a deficient number, since it is larger than the sum of its proper divisors (1183666437).

1609658955 is a wasteful number, since it uses less digits than its factorization.

1609658955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41675 (or 41672 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 54.

The square root of 1609658955 is about 40120.5552678424. Note that the first 3 decimals coincide. The cubic root of 1609658955 is about 1171.9559546847.

The spelling of 1609658955 in words is "one billion, six hundred nine million, six hundred fifty-eight thousand, nine hundred fifty-five".