1650880561 has 16 divisors (see below), whose sum is σ = 1819798848. Its totient is φ = 1497534720.

The previous prime is 1650880549. The next prime is 1650880573.

1650880561 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (1650880549) and next prime (1650880573).

It is a de Polignac number, because none of the positive numbers 2^k-1650880561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1650880501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 780241 + ... + 782353.

It is an arithmetic number, because the mean of its divisors is an integer number (113737428).

Almost surely, 2^1650880561 is an apocalyptic number.

1650880561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1650880561 is a deficient number, since it is larger than the sum of its proper divisors (168918287).

1650880561 is an equidigital number, since it uses as much as digits as its factorization.

1650880561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733 (or 2711 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 1650880561 is about 40631.0295340888. The cubic root of 1650880561 is about 1181.8759209178.

The spelling of 1650880561 in words is "one billion, six hundred fifty million, eight hundred eighty thousand, five hundred sixty-one".