1606125081 has 48 divisors (see below), whose sum is σ = 2520403200. Its totient is φ = 906317280.

The previous prime is 1606125077. The next prime is 1606125109. The reversal of 1606125081 is 1805216061.

It is not a de Polignac number, because 1606125081 - 2² = 1606125077 is a prime.

It is a super-2 number, since 2×1606125081² = 5159275551634513122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1606125011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 404950 + ... + 408896.

It is an arithmetic number, because the mean of its divisors is an integer number (52508400).

Almost surely, 2^1606125081 is an apocalyptic number.

1606125081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1606125081 is a deficient number, since it is larger than the sum of its proper divisors (914278119).

1606125081 is a wasteful number, since it uses less digits than its factorization.

1606125081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4050 (or 4039 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 1606125081 is about 40076.4903777763. The cubic root of 1606125081 is about 1171.0976819487.

The spelling of 1606125081 in words is "one billion, six hundred six million, one hundred twenty-five thousand, eighty-one".