87777277778 has 16 divisors (see below), whose sum is σ = 137930256000. Its totient is φ = 41838839952.

The previous prime is 87777277771. The next prime is 87777277793.

87777277778 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (87777277771) 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, 9573908 + ... + 9583071.

It is an arithmetic number, because the mean of its divisors is an integer number (8620641000).

Almost surely, 2^87777277778 is an apocalyptic number.

87777277778 is a deficient number, since it is larger than the sum of its proper divisors (50152978222).

87777277778 is a wasteful number, since it uses less digits than its factorization.

87777277778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19157089.

The product of its digits is 737894528, while the sum is 74.

The spelling of 87777277778 in words is "eighty-seven billion, seven hundred seventy-seven million, two hundred seventy-seven thousand, seven hundred seventy-eight".