61280569 has 4 divisors (see below), whose sum is σ = 70034944. Its totient is φ = 52526196.

The previous prime is 61280551. The next prime is 61280591. The reversal of 61280569 is 96508216.

61280569 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 not a de Polignac number, because 61280569 - 2¹⁵ = 61247801 is a prime.

It is a super-2 number, since 2×61280569² = 7510616273927522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61280599) 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, 4377177 + ... + 4377190.

It is an arithmetic number, because the mean of its divisors is an integer number (17508736).

Almost surely, 2^61280569 is an apocalyptic number.

It is an amenable number.

61280569 is a deficient number, since it is larger than the sum of its proper divisors (8754375).

61280569 is an equidigital number, since it uses as much as digits as its factorization.

61280569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8754374.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 61280569 is about 7828.1906594053. The cubic root of 61280569 is about 394.2523249086.

The spelling of 61280569 in words is "sixty-one million, two hundred eighty thousand, five hundred sixty-nine".