521831464674016 has 96 divisors (see below), whose sum is σ = 1176698288360448. Its totient is φ = 223151139509760.

The previous prime is 521831464673993. The next prime is 521831464674019. The reversal of 521831464674016 is 610476464138125.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521831464674019) 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, 3660028906 + ... + 3660171478.

It is an arithmetic number, because the mean of its divisors is an integer number (12257273837088).

Almost surely, 2^{521831464674016} is an apocalyptic number.

521831464674016 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521831464674016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (588349144180224).

521831464674016 is an abundant number, since it is smaller than the sum of its proper divisors (654866823686432).

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

521831464674016 is a wasteful number, since it uses less digits than its factorization.

521831464674016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178344 (or 178336 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 58.

The spelling of 521831464674016 in words is "five hundred twenty-one trillion, eight hundred thirty-one billion, four hundred sixty-four million, six hundred seventy-four thousand, sixteen".