78488596265641 has 9 divisors (see below), whose sum is σ = 79066910226199. Its totient is φ = 77914481928304.

The previous prime is 78488596265633. The next prime is 78488596265647. The reversal of 78488596265641 is 14656269588487.

The square root of 78488596265641 is 8859379.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 46104575301225 + 32384020964416 = 6790035^2 + 5690696^2 .

It is not a de Polignac number, because 78488596265641 - 2³ = 78488596265633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78488596265647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1213702590 + ... + 1213767256.

Almost surely, 2^{78488596265641} is an apocalyptic number.

78488596265641 is the 8859379-th square number.

78488596265641 is the 4429690-th centered octagonal number.

It is an amenable number.

78488596265641 is a deficient number, since it is larger than the sum of its proper divisors (578313960558).

78488596265641 is an frugal number, since it uses more digits than its factorization.

78488596265641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129608 (or 64804 counting only the distinct ones).

The product of its digits is 5573836800, while the sum is 79.

The spelling of 78488596265641 in words is "seventy-eight trillion, four hundred eighty-eight billion, five hundred ninety-six million, two hundred sixty-five thousand, six hundred forty-one".