61178642085 has 32 divisors (see below), whose sum is σ = 107599726080. Its totient is φ = 29435931200.

The previous prime is 61178642069. The next prime is 61178642209. The reversal of 61178642085 is 58024687116.

It is not a de Polignac number, because 61178642085 - 2⁴ = 61178642069 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1393575 + ... + 1436804.

It is an arithmetic number, because the mean of its divisors is an integer number (3362491440).

Almost surely, 2^61178642085 is an apocalyptic number.

It is an amenable number.

61178642085 is a deficient number, since it is larger than the sum of its proper divisors (46421083995).

61178642085 is a wasteful number, since it uses less digits than its factorization.

61178642085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2830529.

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 61178642085 in words is "sixty-one billion, one hundred seventy-eight million, six hundred forty-two thousand, eighty-five".