61611101 has 2 divisors, whose sum is σ = 61611102. Its totient is φ = 61611100.

The previous prime is 61611083. The next prime is 61611113. The reversal of 61611101 is 10111616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48288601 + 13322500 = 6949^2 + 3650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61611101 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61611101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61611191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30805550 + 30805551.

It is an arithmetic number, because the mean of its divisors is an integer number (30805551).

Almost surely, 2^61611101 is an apocalyptic number.

It is an amenable number.

61611101 is a deficient number, since it is larger than the sum of its proper divisors (1).

61611101 is an equidigital number, since it uses as much as digits as its factorization.

61611101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 61611101 is about 7849.2739154650. The cubic root of 61611101 is about 394.9598869697.

Adding to 61611101 its reverse (10111616), we get a palindrome (71722717).

The spelling of 61611101 in words is "sixty-one million, six hundred eleven thousand, one hundred one".