521433468487 has 4 divisors (see below), whose sum is σ = 544104488880. Its totient is φ = 498762448096.

The previous prime is 521433468469. The next prime is 521433468503. The reversal of 521433468487 is 784864334125.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521433468487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521433466487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11335510162 + ... + 11335510207.

It is an arithmetic number, because the mean of its divisors is an integer number (136026122220).

Almost surely, 2^521433468487 is an apocalyptic number.

521433468487 is a deficient number, since it is larger than the sum of its proper divisors (22671020393).

521433468487 is a wasteful number, since it uses less digits than its factorization.

521433468487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22671020392.

The product of its digits is 15482880, while the sum is 55.

The spelling of 521433468487 in words is "five hundred twenty-one billion, four hundred thirty-three million, four hundred sixty-eight thousand, four hundred eighty-seven".