78517333441 has 16 divisors (see below), whose sum is σ = 86228364240. Its totient is φ = 71189452800.

The previous prime is 78517333439. The next prime is 78517333451. The reversal of 78517333441 is 14433371587.

It can be written as a sum of positive squares in 8 ways, for example, as 20852515216 + 57664818225 = 144404^2 + 240135^2 .

It is a cyclic number.

It is not a de Polignac number, because 78517333441 - 2¹ = 78517333439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78517333391 and 78517333400.

It is not an unprimeable number, because it can be changed into a prime (78517333451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 554436 + ... + 681493.

It is an arithmetic number, because the mean of its divisors is an integer number (5389272765).

Almost surely, 2^78517333441 is an apocalyptic number.

It is an amenable number.

78517333441 is a deficient number, since it is larger than the sum of its proper divisors (7711030799).

78517333441 is a wasteful number, since it uses less digits than its factorization.

78517333441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236084.

The product of its digits is 846720, while the sum is 46.

The spelling of 78517333441 in words is "seventy-eight billion, five hundred seventeen million, three hundred thirty-three thousand, four hundred forty-one".