61347765860 has 48 divisors (see below), whose sum is σ = 131473465200. Its totient is φ = 24040710144.

The previous prime is 61347765851. The next prime is 61347765881. The reversal of 61347765860 is 6856774316.

It can be written as a sum of positive squares in 8 ways, for example, as 14329047616 + 47018718244 = 119704^2 + 216838^2 .

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 15 ways as a sum of consecutive naturals, for example, 35924 + ... + 352116.

It is an arithmetic number, because the mean of its divisors is an integer number (2739030525).

Almost surely, 2^61347765860 is an apocalyptic number.

It is an amenable number.

61347765860 is an abundant number, since it is smaller than the sum of its proper divisors (70125699340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61347765860 is a wasteful number, since it uses less digits than its factorization.

61347765860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316400 (or 316398 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 61347765860 in words is "sixty-one billion, three hundred forty-seven million, seven hundred sixty-five thousand, eight hundred sixty".