521145928345 has 8 divisors (see below), whose sum is σ = 714714416064. Its totient is φ = 357357207984.

The previous prime is 521145928343. The next prime is 521145928409. The reversal of 521145928345 is 543829541125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 521145928345 - 2¹ = 521145928343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521145928343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7444941799 + ... + 7444941868.

It is an arithmetic number, because the mean of its divisors is an integer number (89339302008).

Almost surely, 2^521145928345 is an apocalyptic number.

It is an amenable number.

521145928345 is a deficient number, since it is larger than the sum of its proper divisors (193568487719).

521145928345 is a wasteful number, since it uses less digits than its factorization.

521145928345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14889883679.

The product of its digits is 1728000, while the sum is 49.

The spelling of 521145928345 in words is "five hundred twenty-one billion, one hundred forty-five million, nine hundred twenty-eight thousand, three hundred forty-five".