61568486516 has 6 divisors (see below), whose sum is σ = 107744851410. Its totient is φ = 30784243256.

The previous prime is 61568486501. The next prime is 61568486641.

61568486516 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 61530786916 + 37699600 = 248054^2 + 6140^2 .

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 as a sum of consecutive naturals, namely, 7696060811 + ... + 7696060818.

It is an arithmetic number, because the mean of its divisors is an integer number (17957475235).

Almost surely, 2^61568486516 is an apocalyptic number.

It is an amenable number.

61568486516 is a deficient number, since it is larger than the sum of its proper divisors (46176364894).

61568486516 is a wasteful number, since it uses less digits than its factorization.

61568486516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15392121633 (or 15392121631 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 56.

The spelling of 61568486516 in words is "sixty-one billion, five hundred sixty-eight million, four hundred eighty-six thousand, five hundred sixteen".