87891267788 has 24 divisors (see below), whose sum is σ = 159125964480. Its totient is φ = 42426944000.

The previous prime is 87891267757. The next prime is 87891267791. The reversal of 87891267788 is 88776219878.

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, 2136413 + ... + 2177163.

It is an arithmetic number, because the mean of its divisors is an integer number (6630248520).

Almost surely, 2^87891267788 is an apocalyptic number.

It is an amenable number.

87891267788 is a deficient number, since it is larger than the sum of its proper divisors (71234696692).

87891267788 is a wasteful number, since it uses less digits than its factorization.

87891267788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59377 (or 59375 counting only the distinct ones).

The product of its digits is 151732224, while the sum is 71.

The spelling of 87891267788 in words is "eighty-seven billion, eight hundred ninety-one million, two hundred sixty-seven thousand, seven hundred eighty-eight".