487617561 has 24 divisors (see below), whose sum is σ = 731544840. Its totient is φ = 312719616.

The previous prime is 487617547. The next prime is 487617587. The reversal of 487617561 is 165716784.

487617561 is a `hidden beast` number, since 4 + 8 + 76 + 17 + 561 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 205377561 + 282240000 = 14331^2 + 16800^2 .

It is not a de Polignac number, because 487617561 - 2⁶ = 487617497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (487617761) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21411 + ... + 37863.

It is an arithmetic number, because the mean of its divisors is an integer number (30481035).

Almost surely, 2^487617561 is an apocalyptic number.

It is an amenable number.

487617561 is a deficient number, since it is larger than the sum of its proper divisors (243927279).

487617561 is a wasteful number, since it uses less digits than its factorization.

487617561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16585 (or 16582 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 487617561 is about 22082.0642377473. The cubic root of 487617561 is about 787.0937175645.

The spelling of 487617561 in words is "four hundred eighty-seven million, six hundred seventeen thousand, five hundred sixty-one".