61616101 has 2 divisors, whose sum is σ = 61616102. Its totient is φ = 61616100.

The previous prime is 61616089. The next prime is 61616123. The reversal of 61616101 is 10161616.

61616101 = 5550² + 5551².

It is an a-pointer prime, because the next prime (61616123) can be obtained adding 61616101 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30813601 + 30802500 = 5551^2 + 5550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61616101 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61616131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30808050 + 30808051.

It is an arithmetic number, because the mean of its divisors is an integer number (30808051).

Almost surely, 2^61616101 is an apocalyptic number.

61616101 is the 5551-st centered square number.

It is an amenable number.

61616101 is a deficient number, since it is larger than the sum of its proper divisors (1).

61616101 is an equidigital number, since it uses as much as digits as its factorization.

61616101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 61616101 is about 7849.5924098007. The cubic root of 61616101 is about 394.9705708994.

Adding to 61616101 its reverse (10161616), we get a palindrome (71777717).

The spelling of 61616101 in words is "sixty-one million, six hundred sixteen thousand, one hundred one".