501245122400 has 144 divisors (see below), whose sum is σ = 1413431253360. Its totient is φ = 171549081600.

The previous prime is 501245122381. The next prime is 501245122403. The reversal of 501245122400 is 4221542105.

It is a self number, because there is not a number n which added to its sum of digits gives 501245122400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501245122403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1525685 + ... + 1824884.

It is an arithmetic number, because the mean of its divisors is an integer number (9815494815).

Almost surely, 2^501245122400 is an apocalyptic number.

501245122400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

501245122400 is an abundant number, since it is smaller than the sum of its proper divisors (912186130960).

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

501245122400 is a wasteful number, since it uses less digits than its factorization.

501245122400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350617 (or 3350604 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 501245122400 its reverse (4221542105), we get a palindrome (505466664505).

The spelling of 501245122400 in words is "five hundred one billion, two hundred forty-five million, one hundred twenty-two thousand, four hundred".