77419488881 has 12 divisors (see below), whose sum is σ = 90122509620. Its totient is φ = 66313064160.

The previous prime is 77419488871. The next prime is 77419488919. The reversal of 77419488881 is 18888491477.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6215903281 + 71203585600 = 78841^2 + 266840^2 .

It is not a de Polignac number, because 77419488881 - 2³⁰ = 76345747057 is a prime.

It is a super-2 number, since 2×77419488881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77419488851) 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 11 ways as a sum of consecutive naturals, for example, 482810 + ... + 622851.

It is an arithmetic number, because the mean of its divisors is an integer number (7510209135).

Almost surely, 2^77419488881 is an apocalyptic number.

It is an amenable number.

77419488881 is a deficient number, since it is larger than the sum of its proper divisors (12703020739).

77419488881 is a wasteful number, since it uses less digits than its factorization.

77419488881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107104 (or 1107097 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 65.

The spelling of 77419488881 in words is "seventy-seven billion, four hundred nineteen million, four hundred eighty-eight thousand, eight hundred eighty-one".