78831527533 has 4 divisors (see below), whose sum is σ = 85998030048. Its totient is φ = 71665025020.

The previous prime is 78831527513. The next prime is 78831527557. The reversal of 78831527533 is 33572513887.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33572513887 = 11 ⋅3052046717.

It is a cyclic number.

It is not a de Polignac number, because 78831527533 - 2⁵ = 78831527501 is a prime.

It is a super-2 number, since 2×78831527533² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78831527513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3583251241 + ... + 3583251262.

It is an arithmetic number, because the mean of its divisors is an integer number (21499507512).

Almost surely, 2^78831527533 is an apocalyptic number.

It is an amenable number.

78831527533 is a deficient number, since it is larger than the sum of its proper divisors (7166502515).

78831527533 is a wasteful number, since it uses less digits than its factorization.

78831527533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7166502514.

The product of its digits is 4233600, while the sum is 52.

The spelling of 78831527533 in words is "seventy-eight billion, eight hundred thirty-one million, five hundred twenty-seven thousand, five hundred thirty-three".