61765745 has 4 divisors (see below), whose sum is σ = 74118900. Its totient is φ = 49412592.

The previous prime is 61765729. The next prime is 61765747. The reversal of 61765745 is 54756716.

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 43507216 + 18258529 = 6596^2 + 4273^2 .

It is a cyclic number.

It is not a de Polignac number, because 61765745 - 2⁴ = 61765729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61765747) 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, 6176570 + ... + 6176579.

It is an arithmetic number, because the mean of its divisors is an integer number (18529725).

Almost surely, 2^61765745 is an apocalyptic number.

It is an amenable number.

61765745 is a deficient number, since it is larger than the sum of its proper divisors (12353155).

61765745 is a wasteful number, since it uses less digits than its factorization.

61765745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12353154.

The product of its digits is 176400, while the sum is 41.

The square root of 61765745 is about 7859.1185892567. The cubic root of 61765745 is about 395.2900609415.

The spelling of 61765745 in words is "sixty-one million, seven hundred sixty-five thousand, seven hundred forty-five".