61081305 has 16 divisors (see below), whose sum is σ = 98082240. Its totient is φ = 32459328.

The previous prime is 61081303. The next prime is 61081327. The reversal of 61081305 is 50318016.

It is not a de Polignac number, because 61081305 - 2¹ = 61081303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61081301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2950 + ... + 11439.

It is an arithmetic number, because the mean of its divisors is an integer number (6130140).

Almost surely, 2^61081305 is an apocalyptic number.

It is an amenable number.

61081305 is a deficient number, since it is larger than the sum of its proper divisors (37000935).

61081305 is a wasteful number, since it uses less digits than its factorization.

61081305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14680.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 61081305 is about 7815.4529619210. The cubic root of 61081305 is about 393.8245351467.

The spelling of 61081305 in words is "sixty-one million, eighty-one thousand, three hundred five".