61784875793 has 2 divisors, whose sum is σ = 61784875794. Its totient is φ = 61784875792.

The previous prime is 61784875787. The next prime is 61784875847. The reversal of 61784875793 is 39757848716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58713166864 + 3071708929 = 242308^2 + 55423^2 .

It is a cyclic number.

It is not a de Polignac number, because 61784875793 - 2⁴ = 61784875777 is a prime.

It is not a weakly prime, because it can be changed into another prime (61784875703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30892437896 + 30892437897.

It is an arithmetic number, because the mean of its divisors is an integer number (30892437897).

Almost surely, 2^61784875793 is an apocalyptic number.

It is an amenable number.

61784875793 is a deficient number, since it is larger than the sum of its proper divisors (1).

61784875793 is an equidigital number, since it uses as much as digits as its factorization.

61784875793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71124480, while the sum is 65.

The spelling of 61784875793 in words is "sixty-one billion, seven hundred eighty-four million, eight hundred seventy-five thousand, seven hundred ninety-three".