61307645 has 8 divisors (see below), whose sum is σ = 84079104. Its totient is φ = 42039504.

The previous prime is 61307641. The next prime is 61307647. The reversal of 61307645 is 54670316.

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 61307645 - 2² = 61307641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61307641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 875789 + ... + 875858.

It is an arithmetic number, because the mean of its divisors is an integer number (10509888).

Almost surely, 2^61307645 is an apocalyptic number.

It is an amenable number.

61307645 is a deficient number, since it is larger than the sum of its proper divisors (22771459).

61307645 is a wasteful number, since it uses less digits than its factorization.

61307645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751659.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 61307645 is about 7829.9198591046. The cubic root of 61307645 is about 394.3103813983.

The spelling of 61307645 in words is "sixty-one million, three hundred seven thousand, six hundred forty-five".