561606038501 has 2 divisors, whose sum is σ = 561606038502. Its totient is φ = 561606038500.

The previous prime is 561606038459. The next prime is 561606038531. The reversal of 561606038501 is 105830606165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 551416145476 + 10189893025 = 742574^2 + 100945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561606038501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561606038531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280803019250 + 280803019251.

It is an arithmetic number, because the mean of its divisors is an integer number (280803019251).

Almost surely, 2^561606038501 is an apocalyptic number.

It is an amenable number.

561606038501 is a deficient number, since it is larger than the sum of its proper divisors (1).

561606038501 is an equidigital number, since it uses as much as digits as its factorization.

561606038501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 561606038501 in words is "five hundred sixty-one billion, six hundred six million, thirty-eight thousand, five hundred one".