521853356108 has 48 divisors (see below), whose sum is σ = 1065208200000. Its totient is φ = 223609155840.

The previous prime is 521853356107. The next prime is 521853356137. The reversal of 521853356108 is 801653358125.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (521853356107) 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, 7854548 + ... + 7920708.

It is an arithmetic number, because the mean of its divisors is an integer number (22191837500).

Almost surely, 2^521853356108 is an apocalyptic number.

It is an amenable number.

521853356108 is an abundant number, since it is smaller than the sum of its proper divisors (543354843892).

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

521853356108 is a wasteful number, since it uses less digits than its factorization.

521853356108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71935 (or 71919 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 521853356108 in words is "five hundred twenty-one billion, eight hundred fifty-three million, three hundred fifty-six thousand, one hundred eight".