87767276778 has 48 divisors (see below), whose sum is σ = 191298931200. Its totient is φ = 29081041920.

The previous prime is 87767276771. The next prime is 87767276789.

87767276778 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×87767276778² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87767276771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14434743 + ... + 14440821.

It is an arithmetic number, because the mean of its divisors is an integer number (3985394400).

Almost surely, 2^87767276778 is an apocalyptic number.

87767276778 is an abundant number, since it is smaller than the sum of its proper divisors (103531654422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87767276778 is a wasteful number, since it uses less digits than its factorization.

87767276778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10747 (or 10744 counting only the distinct ones).

The product of its digits is 542126592, while the sum is 72.

The spelling of 87767276778 in words is "eighty-seven billion, seven hundred sixty-seven million, two hundred seventy-six thousand, seven hundred seventy-eight".