16505478399060 has 216 divisors, whose sum is σ = 60397825531680. Its totient is φ = 3772680722496.

The previous prime is 16505478398989. The next prime is 16505478399083. The reversal of 16505478399060 is 6099387450561.

16505478399060 is a `hidden beast` number, since 1 + 6 + 5 + 0 + 547 + 83 + 9 + 9 + 0 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 34416850 + ... + 34893129.

Almost surely, 2^{16505478399060} is an apocalyptic number.

16505478399060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16505478399060 is an abundant number, since it is smaller than the sum of its proper divisors (43892347132620).

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

16505478399060 is a wasteful number, since it uses less digits than its factorization.

16505478399060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69310017 (or 69309996 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 63.

The spelling of 16505478399060 in words is "sixteen trillion, five hundred five billion, four hundred seventy-eight million, three hundred ninety-nine thousand, sixty".