61110060061 has 4 divisors (see below), whose sum is σ = 61110559612. Its totient is φ = 61109560512.

The previous prime is 61110060049. The next prime is 61110060073. The reversal of 61110060061 is 16006001116.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (61110060049) and next prime (61110060073).

It can be written as a sum of positive squares in 2 ways, for example, as 58888728900 + 2221331161 = 242670^2 + 47131^2 .

It is a cyclic number.

It is not a de Polignac number, because 61110060061 - 2¹⁷ = 61109928989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61113060061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71275 + ... + 356791.

It is an arithmetic number, because the mean of its divisors is an integer number (15277639903).

Almost surely, 2^61110060061 is an apocalyptic number.

It is an amenable number.

61110060061 is a deficient number, since it is larger than the sum of its proper divisors (499551).

61110060061 is a wasteful number, since it uses less digits than its factorization.

61110060061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499550.

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

Adding to 61110060061 its reverse (16006001116), we get a palindrome (77116061177).

The spelling of 61110060061 in words is "sixty-one billion, one hundred ten million, sixty thousand, sixty-one".