61361345 has 4 divisors (see below), whose sum is σ = 73633620. Its totient is φ = 49089072.

The previous prime is 61361257. The next prime is 61361351. The reversal of 61361345 is 54316316.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9535744 + 51825601 = 3088^2 + 7199^2 .

It is a cyclic number.

It is not a de Polignac number, because 61361345 - 2¹² = 61357249 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6136130 + ... + 6136139.

It is an arithmetic number, because the mean of its divisors is an integer number (18408405).

Almost surely, 2^61361345 is an apocalyptic number.

It is an amenable number.

61361345 is a deficient number, since it is larger than the sum of its proper divisors (12272275).

61361345 is a wasteful number, since it uses less digits than its factorization.

61361345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12272274.

The product of its digits is 6480, while the sum is 29.

The square root of 61361345 is about 7833.3482623971. The cubic root of 61361345 is about 394.4254746474.

The spelling of 61361345 in words is "sixty-one million, three hundred sixty-one thousand, three hundred forty-five".