501694321920 has 288 divisors, whose sum is σ = 1750058279424. Its totient is φ = 121476096000.

The previous prime is 501694321901. The next prime is 501694321927. The reversal of 501694321920 is 29123496105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501694321927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37291195 + ... + 37304645.

It is an arithmetic number, because the mean of its divisors is an integer number (6076591248).

Almost surely, 2^501694321920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 501694321920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (875029139712).

501694321920 is an abundant number, since it is smaller than the sum of its proper divisors (1248363957504).

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

501694321920 is a wasteful number, since it uses less digits than its factorization.

501694321920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14369 (or 14355 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 501694321920 in words is "five hundred one billion, six hundred ninety-four million, three hundred twenty-one thousand, nine hundred twenty".