61144045 has 4 divisors (see below), whose sum is σ = 73372860. Its totient is φ = 48915232.

The previous prime is 61144009. The next prime is 61144049. The reversal of 61144045 is 54044116.

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 26440164 + 34703881 = 5142^2 + 5891^2 .

It is a cyclic number.

It is not a de Polignac number, because 61144045 - 2²¹ = 59046893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61144049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6114400 + ... + 6114409.

It is an arithmetic number, because the mean of its divisors is an integer number (18343215).

Almost surely, 2^61144045 is an apocalyptic number.

It is an amenable number.

61144045 is a deficient number, since it is larger than the sum of its proper divisors (12228815).

61144045 is a wasteful number, since it uses less digits than its factorization.

61144045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12228814.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 61144045 is about 7819.4657745910. The cubic root of 61144045 is about 393.9593286885.

The spelling of 61144045 in words is "sixty-one million, one hundred forty-four thousand, forty-five".