1606081961 has 8 divisors (see below), whose sum is σ = 1761771648. Its totient is φ = 1452006000.

The previous prime is 1606081957. The next prime is 1606082017. The reversal of 1606081961 is 1691806061.

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 1606081961 - 2² = 1606081957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1606081921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401345 + ... + 405326.

It is an arithmetic number, because the mean of its divisors is an integer number (220221456).

Almost surely, 2^1606081961 is an apocalyptic number.

1606081961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1606081961 is a deficient number, since it is larger than the sum of its proper divisors (155689687).

1606081961 is a wasteful number, since it uses less digits than its factorization.

1606081961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806863.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1606081961 is about 40075.9524029062. The cubic root of 1606081961 is about 1171.0872016142.

The spelling of 1606081961 in words is "one billion, six hundred six million, eighty-one thousand, nine hundred sixty-one".