61549845 has 16 divisors (see below), whose sum is σ = 112548480. Its totient is φ = 28137024.

The previous prime is 61549841. The next prime is 61549847. The reversal of 61549845 is 54894516.

It is not a de Polignac number, because 61549845 - 2² = 61549841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61549797 and 61549806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61549841) 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, 292990 + ... + 293199.

It is an arithmetic number, because the mean of its divisors is an integer number (7034280).

Almost surely, 2^61549845 is an apocalyptic number.

It is an amenable number.

61549845 is a deficient number, since it is larger than the sum of its proper divisors (50998635).

61549845 is a wasteful number, since it uses less digits than its factorization.

61549845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586204.

The product of its digits is 172800, while the sum is 42.

The square root of 61549845 is about 7845.3709281334. The cubic root of 61549845 is about 394.8289490654.

The spelling of 61549845 in words is "sixty-one million, five hundred forty-nine thousand, eight hundred forty-five".