61345777 has 2 divisors, whose sum is σ = 61345778. Its totient is φ = 61345776.

The previous prime is 61345733. The next prime is 61345811. The reversal of 61345777 is 77754316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49505296 + 11840481 = 7036^2 + 3441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61345777 is a prime.

It is not a weakly prime, because it can be changed into another prime (61345727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30672888 + 30672889.

It is an arithmetic number, because the mean of its divisors is an integer number (30672889).

Almost surely, 2^61345777 is an apocalyptic number.

It is an amenable number.

61345777 is a deficient number, since it is larger than the sum of its proper divisors (1).

61345777 is an equidigital number, since it uses as much as digits as its factorization.

61345777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 123480, while the sum is 40.

The square root of 61345777 is about 7832.3544991273. The cubic root of 61345777 is about 394.3921152354.

It can be divided in two parts, 6134 and 5777, that added together give a palindrome (11911).

The spelling of 61345777 in words is "sixty-one million, three hundred forty-five thousand, seven hundred seventy-seven".