78827533393 has 32 divisors (see below), whose sum is σ = 102743562240. Its totient is φ = 58843895040.

The previous prime is 78827533391. The next prime is 78827533399. The reversal of 78827533393 is 39333572887.

It is not a de Polignac number, because 78827533393 - 2¹ = 78827533391 is a prime.

It is a super-4 number, since 4×78827533393⁴ (a number of 45 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78827533391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 308173 + ... + 502618.

It is an arithmetic number, because the mean of its divisors is an integer number (3210736320).

Almost surely, 2^78827533393 is an apocalyptic number.

It is an amenable number.

78827533393 is a deficient number, since it is larger than the sum of its proper divisors (23916028847).

78827533393 is a wasteful number, since it uses less digits than its factorization.

78827533393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810877.

The product of its digits is 22861440, while the sum is 58.

The spelling of 78827533393 in words is "seventy-eight billion, eight hundred twenty-seven million, five hundred thirty-three thousand, three hundred ninety-three".