61045685 has 4 divisors (see below), whose sum is σ = 73254828. Its totient is φ = 48836544.

The previous prime is 61045669. The next prime is 61045687. The reversal of 61045685 is 58654016.

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 16982641 + 44063044 = 4121^2 + 6638^2 .

It is a cyclic number.

It is not a de Polignac number, because 61045685 - 2⁴ = 61045669 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 (61045687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6104564 + ... + 6104573.

It is an arithmetic number, because the mean of its divisors is an integer number (18313707).

Almost surely, 2^61045685 is an apocalyptic number.

It is an amenable number.

61045685 is a deficient number, since it is larger than the sum of its proper divisors (12209143).

61045685 is a wasteful number, since it uses less digits than its factorization.

61045685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12209142.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 61045685 is about 7813.1738109426. The cubic root of 61045685 is about 393.7479663958.

The spelling of 61045685 in words is "sixty-one million, forty-five thousand, six hundred eighty-five".