521523040000 has 90 divisors (see below), whose sum is σ = 1300845096320. Its totient is φ = 208609152000.

The previous prime is 521523039991. The next prime is 521523040037. The reversal of 521523040000 is 40325125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1469760 + ... + 1789759.

Almost surely, 2^521523040000 is an apocalyptic number.

521523040000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

521523040000 is an abundant number, since it is smaller than the sum of its proper divisors (779322056320).

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

521523040000 is an frugal number, since it uses more digits than its factorization.

521523040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3259555 (or 3259526 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

Adding to 521523040000 its reverse (40325125), we get a palindrome (521563365125).

The spelling of 521523040000 in words is "five hundred twenty-one billion, five hundred twenty-three million, forty thousand".