1650488081 has 16 divisors (see below), whose sum is σ = 1884819456. Its totient is φ = 1431570000.

The previous prime is 1650488069. The next prime is 1650488083. The reversal of 1650488081 is 1808840561.

It is a cyclic number.

It is not a de Polignac number, because 1650488081 - 2⁶ = 1650488017 is a prime.

It is a super-2 number, since 2×1650488081² = 5448221811046125122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1650488083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9875 + ... + 58296.

It is an arithmetic number, because the mean of its divisors is an integer number (117801216).

Almost surely, 2^1650488081 is an apocalyptic number.

1650488081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1650488081 is a deficient number, since it is larger than the sum of its proper divisors (234331375).

1650488081 is a wasteful number, since it uses less digits than its factorization.

1650488081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68284.

The product of its (nonzero) digits is 61440, while the sum is 41.

The square root of 1650488081 is about 40626.1994407550. The cubic root of 1650488081 is about 1181.7822538497.

The spelling of 1650488081 in words is "one billion, six hundred fifty million, four hundred eighty-eight thousand, eighty-one".