61776568797 has 16 divisors (see below), whose sum is σ = 82502209152. Its totient is φ = 41117711360.

The previous prime is 61776568759. The next prime is 61776568801. The reversal of 61776568797 is 79786567716.

It is a cyclic number.

It is not a de Polignac number, because 61776568797 - 2⁸ = 61776568541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61776568717) 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 15 ways as a sum of consecutive naturals, for example, 5282797 + ... + 5294477.

It is an arithmetic number, because the mean of its divisors is an integer number (5156388072).

Almost surely, 2^61776568797 is an apocalyptic number.

It is an amenable number.

61776568797 is a deficient number, since it is larger than the sum of its proper divisors (20725640355).

61776568797 is a wasteful number, since it uses less digits than its factorization.

61776568797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14388.

The product of its digits is 186701760, while the sum is 69.

The spelling of 61776568797 in words is "sixty-one billion, seven hundred seventy-six million, five hundred sixty-eight thousand, seven hundred ninety-seven".