87782028778 has 16 divisors (see below), whose sum is σ = 133826945760. Its totient is φ = 43174896336.

The previous prime is 87782028751. The next prime is 87782028809.

87782028778 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366976 + ... + 556987.

It is an arithmetic number, because the mean of its divisors is an integer number (8364184110).

Almost surely, 2^87782028778 is an apocalyptic number.

87782028778 is a deficient number, since it is larger than the sum of its proper divisors (46044916982).

87782028778 is a wasteful number, since it uses less digits than its factorization.

87782028778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924741.

The product of its (nonzero) digits is 39337984, while the sum is 64.

The spelling of 87782028778 in words is "eighty-seven billion, seven hundred eighty-two million, twenty-eight thousand, seven hundred seventy-eight".