61541617 has 2 divisors, whose sum is σ = 61541618. Its totient is φ = 61541616.

The previous prime is 61541611. The next prime is 61541621. The reversal of 61541617 is 71614516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58003456 + 3538161 = 7616^2 + 1881^2 .

It is a cyclic number.

It is not a de Polignac number, because 61541617 - 2¹⁵ = 61508849 is a prime.

It is a super-3 number, since 3×61541617³ (a number of 24 digits) contains 333 as substring.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (61541611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30770808 + 30770809.

It is an arithmetic number, because the mean of its divisors is an integer number (30770809).

Almost surely, 2^61541617 is an apocalyptic number.

It is an amenable number.

61541617 is a deficient number, since it is larger than the sum of its proper divisors (1).

61541617 is an equidigital number, since it uses as much as digits as its factorization.

61541617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 31.

The square root of 61541617 is about 7844.8465249487. The cubic root of 61541617 is about 394.8113546676.

The spelling of 61541617 in words is "sixty-one million, five hundred forty-one thousand, six hundred seventeen".