828581819538 has 16 divisors (see below), whose sum is σ = 1807814879136. Its totient is φ = 251085399840.

The previous prime is 828581819497. The next prime is 828581819539. The reversal of 828581819538 is 835918185828.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 12554269993 = 828581819538 / (8 + 2 + 8 + 5 + 8 + 1 + 8 + 1 + 9 + 5 + 3 + 8).

It is not an unprimeable number, because it can be changed into a prime (828581819539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6277134931 + ... + 6277135062.

It is an arithmetic number, because the mean of its divisors is an integer number (112988429946).

Almost surely, 2^828581819538 is an apocalyptic number.

828581819538 is an abundant number, since it is smaller than the sum of its proper divisors (979233059598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

828581819538 is a wasteful number, since it uses less digits than its factorization.

828581819538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12554270009.

The product of its digits is 44236800, while the sum is 66.

The spelling of 828581819538 in words is "eight hundred twenty-eight billion, five hundred eighty-one million, eight hundred nineteen thousand, five hundred thirty-eight".