521271376704 has 252 divisors, whose sum is σ = 1703063294400. Its totient is φ = 151949011968.

The previous prime is 521271376699. The next prime is 521271376709. The reversal of 521271376704 is 407673172125.

521271376704 is a `hidden beast` number, since 5 + 2 + 1 + 271 + 376 + 7 + 0 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (521271376699) and next prime (521271376709).

It is a self number, because there is not a number n which added to its sum of digits gives 521271376704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521271376709) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1708617 + ... + 1990455.

Almost surely, 2^521271376704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521271376704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851531647200).

521271376704 is an abundant number, since it is smaller than the sum of its proper divisors (1181791917696).

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

521271376704 is a wasteful number, since it uses less digits than its factorization.

521271376704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281902 (or 281876 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The spelling of 521271376704 in words is "five hundred twenty-one billion, two hundred seventy-one million, three hundred seventy-six thousand, seven hundred four".