505457556640 has 96 divisors (see below), whose sum is σ = 1209267299520. Its totient is φ = 199625355264.

The previous prime is 505457556623. The next prime is 505457556671. The reversal of 505457556640 is 46655754505.

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, 23587851 + ... + 23609269.

It is an arithmetic number, because the mean of its divisors is an integer number (12596534370).

Almost surely, 2^505457556640 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 505457556640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (604633649760).

505457556640 is an abundant number, since it is smaller than the sum of its proper divisors (703809742880).

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

505457556640 is a wasteful number, since it uses less digits than its factorization.

505457556640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23294 (or 23286 counting only the distinct ones).

The product of its (nonzero) digits is 12600000, while the sum is 52.

The spelling of 505457556640 in words is "five hundred five billion, four hundred fifty-seven million, five hundred fifty-six thousand, six hundred forty".