61553759 has 2 divisors, whose sum is σ = 61553760. Its totient is φ = 61553758.

The previous prime is 61553741. The next prime is 61553777. The reversal of 61553759 is 95735516.

It is a balanced prime because it is at equal distance from previous prime (61553741) and next prime (61553777).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61553759 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61553059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30776879 + 30776880.

It is an arithmetic number, because the mean of its divisors is an integer number (30776880).

Almost surely, 2^61553759 is an apocalyptic number.

61553759 is a deficient number, since it is larger than the sum of its proper divisors (1).

61553759 is an equidigital number, since it uses as much as digits as its factorization.

61553759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141750, while the sum is 41.

The square root of 61553759 is about 7845.6203706272. The cubic root of 61553759 is about 394.8373180426.

The spelling of 61553759 in words is "sixty-one million, five hundred fifty-three thousand, seven hundred fifty-nine".