77887170441 has 12 divisors (see below), whose sum is σ = 112657184068. Its totient is φ = 51853937184.

The previous prime is 77887170397. The next prime is 77887170451. The reversal of 77887170441 is 14407178877.

It can be written as a sum of positive squares in 2 ways, for example, as 34079006025 + 43808164416 = 184605^2 + 209304^2 .

It is not a de Polignac number, because 77887170441 - 2⁷ = 77887170313 is a prime.

It is a super-2 number, since 2×77887170441² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77887170451) 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 11 ways as a sum of consecutive naturals, for example, 5896630 + ... + 5909823.

Almost surely, 2^77887170441 is an apocalyptic number.

It is an amenable number.

77887170441 is a deficient number, since it is larger than the sum of its proper divisors (34770013627).

77887170441 is a wasteful number, since it uses less digits than its factorization.

77887170441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11807192 (or 11807189 counting only the distinct ones).

The product of its (nonzero) digits is 2458624, while the sum is 54.

The spelling of 77887170441 in words is "seventy-seven billion, eight hundred eighty-seven million, one hundred seventy thousand, four hundred forty-one".