61178391125 has 12 divisors (see below), whose sum is σ = 76354083468. Its totient is φ = 48940500600.

The previous prime is 61178391119. The next prime is 61178391133. The reversal of 61178391125 is 52119387116.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 1957708516 + 59220682609 = 44246^2 + 243353^2 .

It is not a de Polignac number, because 61178391125 - 2¹⁰ = 61178390101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 2754314 + ... + 2776436.

It is an arithmetic number, because the mean of its divisors is an integer number (6362840289).

Almost surely, 2^61178391125 is an apocalyptic number.

It is an amenable number.

61178391125 is a deficient number, since it is larger than the sum of its proper divisors (15175692343).

61178391125 is an frugal number, since it uses more digits than its factorization.

61178391125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44261 (or 22128 counting only the distinct ones).

The product of its digits is 90720, while the sum is 44.

The spelling of 61178391125 in words is "sixty-one billion, one hundred seventy-eight million, three hundred ninety-one thousand, one hundred twenty-five".