9777730377779 has 16 divisors (see below), whose sum is σ = 12313993181952. Its totient is φ = 7556313991968.

The previous prime is 9777730377763. The next prime is 9777730377799.

9777730377779 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9777730377779 - 2⁴ = 9777730377763 is a prime.

It is a super-2 number, since 2×9777730377779² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9777730377799) 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, 1249386629 + ... + 1249394454.

It is an arithmetic number, because the mean of its divisors is an integer number (769624573872).

Almost surely, 2^{9777730377779} is an apocalyptic number.

9777730377779 is a deficient number, since it is larger than the sum of its proper divisors (2536262804173).

9777730377779 is a wasteful number, since it uses less digits than its factorization.

9777730377779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2498781146.

The product of its (nonzero) digits is 4202539929, while the sum is 80.

The spelling of 9777730377779 in words is "nine trillion, seven hundred seventy-seven billion, seven hundred thirty million, three hundred seventy-seven thousand, seven hundred seventy-nine".