61140316205 has 8 divisors (see below), whose sum is σ = 74192743800. Its totient is φ = 48362676736.

The previous prime is 61140316199. The next prime is 61140316291. The reversal of 61140316205 is 50261304116.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13101320521 + 48038995684 = 114461^2 + 219178^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61140316205 - 2⁸ = 61140315949 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68696540 + ... + 68697429.

It is an arithmetic number, because the mean of its divisors is an integer number (9274092975).

Almost surely, 2^61140316205 is an apocalyptic number.

It is an amenable number.

61140316205 is a deficient number, since it is larger than the sum of its proper divisors (13052427595).

61140316205 is a wasteful number, since it uses less digits than its factorization.

61140316205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137394063.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 61140316205 in words is "sixty-one billion, one hundred forty million, three hundred sixteen thousand, two hundred five".