561601600139 has 2 divisors, whose sum is σ = 561601600140. Its totient is φ = 561601600138.

The previous prime is 561601600129. The next prime is 561601600177. The reversal of 561601600139 is 931006106165.

It is a happy number.

It is an a-pointer prime, because the next prime (561601600177) can be obtained adding 561601600139 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561601600139 is a prime.

It is not a weakly prime, because it can be changed into another prime (561601600129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280800800069 + 280800800070.

It is an arithmetic number, because the mean of its divisors is an integer number (280800800070).

Almost surely, 2^561601600139 is an apocalyptic number.

561601600139 is a deficient number, since it is larger than the sum of its proper divisors (1).

561601600139 is an equidigital number, since it uses as much as digits as its factorization.

561601600139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 38.

The spelling of 561601600139 in words is "five hundred sixty-one billion, six hundred one million, six hundred thousand, one hundred thirty-nine".