5001620561 has 6 divisors (see below), whose sum is σ = 5818211730. Its totient is φ = 4287103296.

The previous prime is 5001620557. The next prime is 5001620579. The reversal of 5001620561 is 1650261005.

It can be written as a sum of positive squares in only one way, i.e., 4499860561 + 501760000 = 67081^2 + 22400^2 .

It is not a de Polignac number, because 5001620561 - 2² = 5001620557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5001620561.

It is not an unprimeable number, because it can be changed into a prime (5001620501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51036896 + ... + 51036993.

It is an arithmetic number, because the mean of its divisors is an integer number (969701955).

Almost surely, 2^5001620561 is an apocalyptic number.

It is an amenable number.

5001620561 is a deficient number, since it is larger than the sum of its proper divisors (816591169).

5001620561 is a wasteful number, since it uses less digits than its factorization.

5001620561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102073903 (or 102073896 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 5001620561 is about 70722.1362870212. The cubic root of 5001620561 is about 1710.1606680767.

Adding to 5001620561 its reverse (1650261005), we get a palindrome (6651881566).

The spelling of 5001620561 in words is "five billion, one million, six hundred twenty thousand, five hundred sixty-one".