501043221264 has 80 divisors (see below), whose sum is σ = 1366603047680. Its totient is φ = 157746061440.

The previous prime is 501043221251. The next prime is 501043221269. The reversal of 501043221264 is 462122340105.

It is not an unprimeable number, because it can be changed into a prime (501043221269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528022 + ... + 1131765.

It is an arithmetic number, because the mean of its divisors is an integer number (17082538096).

Almost surely, 2^501043221264 is an apocalyptic number.

It is an amenable number.

501043221264 is an abundant number, since it is smaller than the sum of its proper divisors (865559826416).

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

501043221264 is a wasteful number, since it uses less digits than its factorization.

501043221264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660148 (or 1660142 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 501043221264 its reverse (462122340105), we get a palindrome (963165561369).

The spelling of 501043221264 in words is "five hundred one billion, forty-three million, two hundred twenty-one thousand, two hundred sixty-four".