501799421952 has 480 divisors, whose sum is σ = 1613573521560. Its totient is φ = 154793410560.

The previous prime is 501799421927. The next prime is 501799421953. The reversal of 501799421952 is 259124997105.

It is a happy number.

501799421952 is a `hidden beast` number, since 501 + 7 + 9 + 9 + 42 + 1 + 95 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 486958334976 + 14841086976 = 697824^2 + 121824^2 .

It is a super-2 number, since 2×501799421952² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (501799421953) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 172024398 + ... + 172027314.

Almost surely, 2^501799421952 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 501799421952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (806786760780).

501799421952 is an abundant number, since it is smaller than the sum of its proper divisors (1111774099608).

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

501799421952 is a wasteful number, since it uses less digits than its factorization.

501799421952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3029 (or 3000 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 54.

The spelling of 501799421952 in words is "five hundred one billion, seven hundred ninety-nine million, four hundred twenty-one thousand, nine hundred fifty-two".