6461801617 has 2 divisors, whose sum is σ = 6461801618. Its totient is φ = 6461801616.

The previous prime is 6461801587. The next prime is 6461801683. The reversal of 6461801617 is 7161081646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6184878736 + 276922881 = 78644^2 + 16641^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6461801617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6461801617.

It is not a weakly prime, because it can be changed into another prime (6461801117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3230900808 + 3230900809.

It is an arithmetic number, because the mean of its divisors is an integer number (3230900809).

Almost surely, 2^6461801617 is an apocalyptic number.

It is an amenable number.

6461801617 is a deficient number, since it is larger than the sum of its proper divisors (1).

6461801617 is an equidigital number, since it uses as much as digits as its factorization.

6461801617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 6461801617 is about 80385.3321010743. The cubic root of 6461801617 is about 1862.5926015668.

The spelling of 6461801617 in words is "six billion, four hundred sixty-one million, eight hundred one thousand, six hundred seventeen".