4631717561 has 4 divisors (see below), whose sum is σ = 4744686324. Its totient is φ = 4518748800.

The previous prime is 4631717549. The next prime is 4631717591. The reversal of 4631717561 is 1657171364.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 435139600 + 4196577961 = 20860^2 + 64781^2 .

It is a cyclic number.

It is not a de Polignac number, because 4631717561 - 2³⁰ = 3557975737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 112968721 = 4631717561 / (4 + 6 + 3 + 1 + 7 + 1 + 7 + 5 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4631717591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56484320 + ... + 56484401.

It is an arithmetic number, because the mean of its divisors is an integer number (1186171581).

Almost surely, 2^4631717561 is an apocalyptic number.

4631717561 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4631717561 is a deficient number, since it is larger than the sum of its proper divisors (112968763).

4631717561 is a wasteful number, since it uses less digits than its factorization.

4631717561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112968762.

The product of its digits is 105840, while the sum is 41.

The square root of 4631717561 is about 68056.7231138849. The cubic root of 4631717561 is about 1666.9171807748.

The spelling of 4631717561 in words is "four billion, six hundred thirty-one million, seven hundred seventeen thousand, five hundred sixty-one".