77730008718761 has 16 divisors (see below), whose sum is σ = 91237450149120. Its totient is φ = 64823443836480.

The previous prime is 77730008718707. The next prime is 77730008718773. The reversal of 77730008718761 is 16781780003777.

It is a de Polignac number, because none of the positive numbers 2^k-77730008718761 is a prime.

It is a super-2 number, since 2×77730008718761² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77730008718694 and 77730008718703.

It is not an unprimeable number, because it can be changed into a prime (77730008708761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7024796 + ... + 14311106.

It is an arithmetic number, because the mean of its divisors is an integer number (5702340634320).

Almost surely, 2^{77730008718761} is an apocalyptic number.

It is an amenable number.

77730008718761 is a deficient number, since it is larger than the sum of its proper divisors (13507441430359).

77730008718761 is a wasteful number, since it uses less digits than its factorization.

77730008718761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7327544.

The product of its (nonzero) digits is 19361664, while the sum is 62.

The spelling of 77730008718761 in words is "seventy-seven trillion, seven hundred thirty billion, eight million, seven hundred eighteen thousand, seven hundred sixty-one".