61516061 has 2 divisors, whose sum is σ = 61516062. Its totient is φ = 61516060.

The previous prime is 61516051. The next prime is 61516067. The reversal of 61516061 is 16061516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53071225 + 8444836 = 7285^2 + 2906^2 .

It is a cyclic number.

It is not a de Polignac number, because 61516061 - 2²² = 57321757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61516061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61516067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30758030 + 30758031.

It is an arithmetic number, because the mean of its divisors is an integer number (30758031).

Almost surely, 2^61516061 is an apocalyptic number.

It is an amenable number.

61516061 is a deficient number, since it is larger than the sum of its proper divisors (1).

61516061 is an equidigital number, since it uses as much as digits as its factorization.

61516061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 61516061 is about 7843.2175157903. The cubic root of 61516061 is about 394.7566968256.

Adding to 61516061 its reverse (16061516), we get a palindrome (77577577).

The spelling of 61516061 in words is "sixty-one million, five hundred sixteen thousand, sixty-one".