1650440561 has 8 divisors (see below), whose sum is σ = 2057692224. Its totient is φ = 1286057520.

The previous prime is 1650440531. The next prime is 1650440591.

1650440561 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (1650440531) and next prime (1650440591).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1650440561 - 2⁶ = 1650440497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1650440531) 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, 10717070 + ... + 10717223.

It is an arithmetic number, because the mean of its divisors is an integer number (257211528).

Almost surely, 2^1650440561 is an apocalyptic number.

1650440561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1650440561 is a deficient number, since it is larger than the sum of its proper divisors (407251663).

1650440561 is a wasteful number, since it uses less digits than its factorization.

1650440561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21434311.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 1650440561 is about 40625.6145922742. The cubic root of 1650440561 is about 1181.7709119862.

The spelling of 1650440561 in words is "one billion, six hundred fifty million, four hundred forty thousand, five hundred sixty-one".