78501088868 has 6 divisors (see below), whose sum is σ = 137376905526. Its totient is φ = 39250544432.

The previous prime is 78501088867. The next prime is 78501088879. The reversal of 78501088868 is 86888010587.

It can be written as a sum of positive squares in only one way, i.e., 70030095424 + 8470993444 = 264632^2 + 92038^2 .

It is not an unprimeable number, because it can be changed into a prime (78501088867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9812636105 + ... + 9812636112.

It is an arithmetic number, because the mean of its divisors is an integer number (22896150921).

Almost surely, 2^78501088868 is an apocalyptic number.

It is an amenable number.

78501088868 is a deficient number, since it is larger than the sum of its proper divisors (58875816658).

78501088868 is a wasteful number, since it uses less digits than its factorization.

78501088868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19625272221 (or 19625272219 counting only the distinct ones).

The product of its (nonzero) digits is 6881280, while the sum is 59.

The spelling of 78501088868 in words is "seventy-eight billion, five hundred one million, eighty-eight thousand, eight hundred sixty-eight".