61307688559 has 4 divisors (see below), whose sum is σ = 66023664616. Its totient is φ = 56591712504.

The previous prime is 61307688551. The next prime is 61307688581. The reversal of 61307688559 is 95588670316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61307688559 - 2³ = 61307688551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61307688551) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2357988009 + ... + 2357988034.

It is an arithmetic number, because the mean of its divisors is an integer number (16505916154).

Almost surely, 2^61307688559 is an apocalyptic number.

61307688559 is a deficient number, since it is larger than the sum of its proper divisors (4715976057).

61307688559 is a wasteful number, since it uses less digits than its factorization.

61307688559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4715976056.

The product of its (nonzero) digits is 10886400, while the sum is 58.

The spelling of 61307688559 in words is "sixty-one billion, three hundred seven million, six hundred eighty-eight thousand, five hundred fifty-nine".