613550261 has 16 divisors (see below), whose sum is σ = 664838400. Its totient is φ = 564408000.

The previous prime is 613550257. The next prime is 613550269. The reversal of 613550261 is 162055316.

It is a cyclic number.

It is not a de Polignac number, because 613550261 - 2² = 613550257 is a prime.

It is a super-3 number, since 3×613550261³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613550269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88211 + ... + 94911.

It is an arithmetic number, because the mean of its divisors is an integer number (41552400).

Almost surely, 2^613550261 is an apocalyptic number.

613550261 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

613550261 is a deficient number, since it is larger than the sum of its proper divisors (51288139).

613550261 is a wasteful number, since it uses less digits than its factorization.

613550261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6860.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 613550261 is about 24769.9467298579. The cubic root of 613550261 is about 849.7347550698.

The spelling of 613550261 in words is "six hundred thirteen million, five hundred fifty thousand, two hundred sixty-one".