77565500613 has 96 divisors (see below), whose sum is σ = 122364383232. Its totient is φ = 49037788800.

The previous prime is 77565500609. The next prime is 77565500629. The reversal of 77565500613 is 31600556577.

77565500613 is a `hidden beast` number, since 7 + 75 + 65 + 500 + 6 + 13 = 666.

It is not a de Polignac number, because 77565500613 - 2² = 77565500609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77565500693) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 157974298 + ... + 157974788.

It is an arithmetic number, because the mean of its divisors is an integer number (1274628992).

Almost surely, 2^77565500613 is an apocalyptic number.

It is an amenable number.

77565500613 is a deficient number, since it is larger than the sum of its proper divisors (44798882619).

77565500613 is a wasteful number, since it uses less digits than its factorization.

77565500613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 661500, while the sum is 45.

The spelling of 77565500613 in words is "seventy-seven billion, five hundred sixty-five million, five hundred thousand, six hundred thirteen".