8787278881 has 4 divisors (see below), whose sum is σ = 8806095792. Its totient is φ = 8768461972.

The previous prime is 8787278849. The next prime is 8787278887. The reversal of 8787278881 is 1888727878.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8787278881 - 2⁵ = 8787278849 is a prime.

It is a super-2 number, since 2×8787278881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8787278887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9407755 + ... + 9408688.

It is an arithmetic number, because the mean of its divisors is an integer number (2201523948).

Almost surely, 2^8787278881 is an apocalyptic number.

It is an amenable number.

8787278881 is a deficient number, since it is larger than the sum of its proper divisors (18816911).

8787278881 is a wasteful number, since it uses less digits than its factorization.

8787278881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18816910.

The product of its digits is 22478848, while the sum is 64.

The square root of 8787278881 is about 93740.4868826699. The cubic root of 8787278881 is about 2063.5649209920.

It can be divided in two parts, 87872 and 78881, that added together give a triangular number (166753 = T₅₇₇).

The spelling of 8787278881 in words is "eight billion, seven hundred eighty-seven million, two hundred seventy-eight thousand, eight hundred eighty-one".