503404445456 has 80 divisors (see below), whose sum is σ = 1069610856000. Its totient is φ = 227619624960.

The previous prime is 503404445441. The next prime is 503404445497. The reversal of 503404445456 is 654544404305.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27479756 + ... + 27498068.

It is an arithmetic number, because the mean of its divisors is an integer number (13370135700).

Almost surely, 2^503404445456 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 503404445456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534805428000).

503404445456 is an abundant number, since it is smaller than the sum of its proper divisors (566206410544).

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

503404445456 is a wasteful number, since it uses less digits than its factorization.

503404445456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19144 (or 19138 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 44.

The spelling of 503404445456 in words is "five hundred three billion, four hundred four million, four hundred forty-five thousand, four hundred fifty-six".