521440522498890 has 48 divisors (see below), whose sum is σ = 1355872172836896. Its totient is φ = 139037799400800.

The previous prime is 521440522498867. The next prime is 521440522498891. The reversal of 521440522498890 is 98894225044125.

521440522498890 is a `hidden beast` number, since 5 + 2 + 1 + 4 + 4 + 0 + 52 + 2 + 498 + 8 + 90 = 666.

It is not an unprimeable number, because it can be changed into a prime (521440522498891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 270003276 + ... + 271927655.

It is an arithmetic number, because the mean of its divisors is an integer number (28247336934102).

Almost surely, 2^{521440522498890} is an apocalyptic number.

521440522498890 is an abundant number, since it is smaller than the sum of its proper divisors (834431650338006).

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

521440522498890 is a wasteful number, since it uses less digits than its factorization.

521440522498890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541941635 (or 541941632 counting only the distinct ones).

The product of its (nonzero) digits is 66355200, while the sum is 63.

The spelling of 521440522498890 in words is "five hundred twenty-one trillion, four hundred forty billion, five hundred twenty-two million, four hundred ninety-eight thousand, eight hundred ninety".