5601313661 has 2 divisors, whose sum is σ = 5601313662. Its totient is φ = 5601313660.

The previous prime is 5601313657. The next prime is 5601313667. The reversal of 5601313661 is 1663131065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4721064100 + 880249561 = 68710^2 + 29669^2 .

It is a cyclic number.

It is not a de Polignac number, because 5601313661 - 2² = 5601313657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5601313667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2800656830 + 2800656831.

It is an arithmetic number, because the mean of its divisors is an integer number (2800656831).

Almost surely, 2^5601313661 is an apocalyptic number.

It is an amenable number.

5601313661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5601313661 is an equidigital number, since it uses as much as digits as its factorization.

5601313661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 5601313661 is about 74841.9244875491. The cubic root of 5601313661 is about 1775.9468503501.

The spelling of 5601313661 in words is "five billion, six hundred one million, three hundred thirteen thousand, six hundred sixty-one".