61130647779 has 16 divisors (see below), whose sum is σ = 83179562400. Its totient is φ = 39926151936.

The previous prime is 61130647763. The next prime is 61130647783. The reversal of 61130647779 is 97774603116.

It is not a de Polignac number, because 61130647779 - 2⁴ = 61130647763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61130647789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1021144 + ... + 1079349.

It is an arithmetic number, because the mean of its divisors is an integer number (5198722650).

Almost surely, 2^61130647779 is an apocalyptic number.

61130647779 is a deficient number, since it is larger than the sum of its proper divisors (22048914621).

61130647779 is a wasteful number, since it uses less digits than its factorization.

61130647779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100694.

The product of its (nonzero) digits is 1333584, while the sum is 51.

The spelling of 61130647779 in words is "sixty-one billion, one hundred thirty million, six hundred forty-seven thousand, seven hundred seventy-nine".