505405416440 has 16 divisors (see below), whose sum is σ = 1137162187080. Its totient is φ = 202162166560.

The previous prime is 505405416431. The next prime is 505405416493. The reversal of 505405416440 is 44614504505.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 505405416394 and 505405416403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6317567666 + ... + 6317567745.

Almost surely, 2^505405416440 is an apocalyptic number.

It is an amenable number.

505405416440 is an abundant number, since it is smaller than the sum of its proper divisors (631756770640).

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

505405416440 is a wasteful number, since it uses less digits than its factorization.

505405416440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12635135422 (or 12635135418 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 38.

The spelling of 505405416440 in words is "five hundred five billion, four hundred five million, four hundred sixteen thousand, four hundred forty".