501389991244 has 24 divisors (see below), whose sum is σ = 888070897728. Its totient is φ = 247655904720.

The previous prime is 501389991143. The next prime is 501389991281. The reversal of 501389991244 is 442199983105.

It is a happy number.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5040639 + ... + 5139145.

It is an arithmetic number, because the mean of its divisors is an integer number (37002954072).

Almost surely, 2^501389991244 is an apocalyptic number.

It is an amenable number.

501389991244 is a deficient number, since it is larger than the sum of its proper divisors (386680906484).

501389991244 is a wasteful number, since it uses less digits than its factorization.

501389991244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113925 (or 113923 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 55.

The spelling of 501389991244 in words is "five hundred one billion, three hundred eighty-nine million, nine hundred ninety-one thousand, two hundred forty-four".