87776533567778 has 16 divisors (see below), whose sum is σ = 149879298424896. Its totient is φ = 38163710246640.

The previous prime is 87776533567771. The next prime is 87776533567909.

87776533567778 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 87776533567778.

It is not an unprimeable number, because it can be changed into a prime (87776533567771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86735704601 + ... + 86735705612.

It is an arithmetic number, because the mean of its divisors is an integer number (9367456151556).

Almost surely, 2^{87776533567778} is an apocalyptic number.

87776533567778 is a deficient number, since it is larger than the sum of its proper divisors (62102764857118).

87776533567778 is a wasteful number, since it uses less digits than its factorization.

87776533567778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173471410249.

The product of its digits is 60989241600, while the sum is 86.

The spelling of 87776533567778 in words is "eighty-seven trillion, seven hundred seventy-six billion, five hundred thirty-three million, five hundred sixty-seven thousand, seven hundred seventy-eight".