505521694640 has 160 divisors (see below), whose sum is σ = 1260014401536. Its totient is φ = 188279562240.

The previous prime is 505521694637. The next prime is 505521694661. The reversal of 505521694640 is 46496125505.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7109504 + ... + 7180256.

Almost surely, 2^505521694640 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 505521694640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (630007200768).

505521694640 is an abundant number, since it is smaller than the sum of its proper divisors (754492706896).

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

505521694640 is a wasteful number, since it uses less digits than its factorization.

505521694640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70907 (or 70901 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 47.

The spelling of 505521694640 in words is "five hundred five billion, five hundred twenty-one million, six hundred ninety-four thousand, six hundred forty".