503040645450 has 288 divisors, whose sum is σ = 1564153673472. Its totient is φ = 113529600000.

The previous prime is 503040645409. The next prime is 503040645461. The reversal of 503040645450 is 54546040305.

503040645450 is a `hidden beast` number, since 5 + 0 + 3 + 0 + 4 + 0 + 645 + 4 + 5 + 0 = 666.

It is a super-5 number, since 5×503040645450⁵ (a number of 60 digits) contains 55555 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 127576179 + ... + 127580121.

It is an arithmetic number, because the mean of its divisors is an integer number (5431089144).

Almost surely, 2^503040645450 is an apocalyptic number.

503040645450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 503040645450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (782076836736).

503040645450 is an abundant number, since it is smaller than the sum of its proper divisors (1061113028022).

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

503040645450 is a wasteful number, since it uses less digits than its factorization.

503040645450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4470 (or 4462 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 503040645450 its reverse (54546040305), we get a palindrome (557586685755).

The spelling of 503040645450 in words is "five hundred three billion, forty million, six hundred forty-five thousand, four hundred fifty".