1650220561 has 8 divisors (see below), whose sum is σ = 1834208064. Its totient is φ = 1471894320.

The previous prime is 1650220529. The next prime is 1650220571.

1650220561 is nontrivially palindromic in base 10.

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 1650220561 - 2⁵ = 1650220529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1650220571) 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, 1414701 + ... + 1415866.

It is an arithmetic number, because the mean of its divisors is an integer number (229276008).

Almost surely, 2^1650220561 is an apocalyptic number.

1650220561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1650220561 is a deficient number, since it is larger than the sum of its proper divisors (183987503).

1650220561 is a wasteful number, since it uses less digits than its factorization.

1650220561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830631.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1650220561 is about 40622.9068506920. The cubic root of 1650220561 is about 1181.7184005215.

The spelling of 1650220561 in words is "one billion, six hundred fifty million, two hundred twenty thousand, five hundred sixty-one".