61185445 has 8 divisors (see below), whose sum is σ = 73585944. Its totient is φ = 48839424.

The previous prime is 61185427. The next prime is 61185463. The reversal of 61185445 is 54458116.

It is an interprime number because it is at equal distance from previous prime (61185427) and next prime (61185463).

It can be written as a sum of positive squares in 4 ways, for example, as 6395841 + 54789604 = 2529^2 + 7402^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61185445 - 2⁷ = 61185317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61185445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11104 + ... + 15673.

It is an arithmetic number, because the mean of its divisors is an integer number (9198243).

Almost surely, 2^61185445 is an apocalyptic number.

It is an amenable number.

61185445 is a deficient number, since it is larger than the sum of its proper divisors (12400499).

61185445 is a wasteful number, since it uses less digits than its factorization.

61185445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27239.

The product of its digits is 19200, while the sum is 34.

The square root of 61185445 is about 7822.1125663084. The cubic root of 61185445 is about 394.0482238894.

The spelling of 61185445 in words is "sixty-one million, one hundred eighty-five thousand, four hundred forty-five".