61010645 has 4 divisors (see below), whose sum is σ = 73212780. Its totient is φ = 48808512.

The previous prime is 61010639. The next prime is 61010659. The reversal of 61010645 is 54601016.

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 32001649 + 29008996 = 5657^2 + 5386^2 .

It is a cyclic number.

It is not a de Polignac number, because 61010645 - 2⁴ = 61010629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61010645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6101060 + ... + 6101069.

It is an arithmetic number, because the mean of its divisors is an integer number (18303195).

Almost surely, 2^61010645 is an apocalyptic number.

It is an amenable number.

61010645 is a deficient number, since it is larger than the sum of its proper divisors (12202135).

61010645 is a wasteful number, since it uses less digits than its factorization.

61010645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12202134.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 61010645 is about 7810.9311224719. The cubic root of 61010645 is about 393.6726153459.

The spelling of 61010645 in words is "sixty-one million, ten thousand, six hundred forty-five".