61511045 has 4 divisors (see below), whose sum is σ = 73813260. Its totient is φ = 49208832.

The previous prime is 61511033. The next prime is 61511071. The reversal of 61511045 is 54011516.

61511045 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.

It can be written as a sum of positive squares in 2 ways, for example, as 29441476 + 32069569 = 5426^2 + 5663^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61511045 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61511045.

It is a congruent number.

It is an unprimeable number.

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, 6151100 + ... + 6151109.

It is an arithmetic number, because the mean of its divisors is an integer number (18453315).

Almost surely, 2^61511045 is an apocalyptic number.

It is an amenable number.

61511045 is a deficient number, since it is larger than the sum of its proper divisors (12302215).

61511045 is a wasteful number, since it uses less digits than its factorization.

61511045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12302214.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 61511045 is about 7842.8977425439. The cubic root of 61511045 is about 394.7459670889.

The spelling of 61511045 in words is "sixty-one million, five hundred eleven thousand, forty-five".