61606261 has 4 divisors (see below), whose sum is σ = 61732224. Its totient is φ = 61480300.

The previous prime is 61606247. The next prime is 61606273. The reversal of 61606261 is 16260616.

61606261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61606261 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 (61606201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62245 + ... + 63226.

It is an arithmetic number, because the mean of its divisors is an integer number (15433056).

Almost surely, 2^61606261 is an apocalyptic number.

It is an amenable number.

61606261 is a deficient number, since it is larger than the sum of its proper divisors (125963).

61606261 is a wasteful number, since it uses less digits than its factorization.

61606261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125962.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 61606261 is about 7848.9656006381. The cubic root of 61606261 is about 394.9495443751.

Adding to 61606261 its reverse (16260616), we get a palindrome (77866877).

It can be divided in two parts, 6160 and 6261, that added together give a palindrome (12421).

The spelling of 61606261 in words is "sixty-one million, six hundred six thousand, two hundred sixty-one".