2487716561 has 6 divisors (see below), whose sum is σ = 2734432386. Its totient is φ = 2261560400.

The previous prime is 2487716507. The next prime is 2487716603. The reversal of 2487716561 is 1656177842.

It can be written as a sum of positive squares in only one way, i.e., 1656490000 + 831226561 = 40700^2 + 28831^2 .

It is not a de Polignac number, because 2487716561 - 2²² = 2483522257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2487706561) 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, 10279700 + ... + 10279941.

It is an arithmetic number, because the mean of its divisors is an integer number (455738731).

Almost surely, 2^2487716561 is an apocalyptic number.

It is an amenable number.

2487716561 is a deficient number, since it is larger than the sum of its proper divisors (246715825).

2487716561 is a wasteful number, since it uses less digits than its factorization.

2487716561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20559663 (or 20559652 counting only the distinct ones).

The product of its digits is 564480, while the sum is 47.

The square root of 2487716561 is about 49877.0143553120. The cubic root of 2487716561 is about 1354.9823322542.

The spelling of 2487716561 in words is "two billion, four hundred eighty-seven million, seven hundred sixteen thousand, five hundred sixty-one".