1650724561 has 8 divisors (see below), whose sum is σ = 1664573544. Its totient is φ = 1636930560.

The previous prime is 1650724547. The next prime is 1650724583. The reversal of 1650724561 is 1654270561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 93238336 + 1557486225 = 9656^2 + 39465^2 .

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 1650724561 - 2⁷ = 1650724433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1650724561.

It is not an unprimeable number, because it can be changed into a prime (1650725561) 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 7 ways as a sum of consecutive naturals, for example, 47691 + ... + 74671.

It is an arithmetic number, because the mean of its divisors is an integer number (208071693).

Almost surely, 2^1650724561 is an apocalyptic number.

It is an amenable number.

1650724561 is a deficient number, since it is larger than the sum of its proper divisors (13848983).

1650724561 is a wasteful number, since it uses less digits than its factorization.

1650724561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27491.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 1650724561 is about 40629.1097736586. The cubic root of 1650724561 is about 1181.8386926135.

The spelling of 1650724561 in words is "one billion, six hundred fifty million, seven hundred twenty-four thousand, five hundred sixty-one".