78228446087565 has 128 divisors (see below), whose sum is σ = 141541705697280. Its totient is φ = 40988435152896.

The previous prime is 78228446087549. The next prime is 78228446087593. The reversal of 78228446087565 is 56578064482287.

78228446087565 is a `hidden beast` number, since 7 + 8 + 2 + 2 + 8 + 4 + 4 + 608 + 7 + 5 + 6 + 5 = 666.

It is not a de Polignac number, because 78228446087565 - 2⁴ = 78228446087549 is a prime.

It is a super-2 number, since 2×78228446087565² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78228446087493 and 78228446087502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1170122679 + ... + 1170189531.

It is an arithmetic number, because the mean of its divisors is an integer number (1105794575760).

Almost surely, 2^{78228446087565} is an apocalyptic number.

It is an amenable number.

78228446087565 is a deficient number, since it is larger than the sum of its proper divisors (63313259609715).

78228446087565 is a wasteful number, since it uses less digits than its factorization.

78228446087565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67620 (or 67614 counting only the distinct ones).

The product of its (nonzero) digits is 1445068800, while the sum is 72.

The spelling of 78228446087565 in words is "seventy-eight trillion, two hundred twenty-eight billion, four hundred forty-six million, eighty-seven thousand, five hundred sixty-five".