16016405663780 has 24 divisors (see below), whose sum is σ = 34454804380920. Its totient is φ = 6250304648960.

The previous prime is 16016405663779. The next prime is 16016405663809. The reversal of 16016405663780 is 8736650461061.

It can be written as a sum of positive squares in 4 ways, for example, as 83790565156 + 15932615098624 = 289466^2 + 3991568^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9766100195 + ... + 9766101834.

It is an arithmetic number, because the mean of its divisors is an integer number (1435616849205).

Almost surely, 2^{16016405663780} is an apocalyptic number.

16016405663780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16016405663780 is an abundant number, since it is smaller than the sum of its proper divisors (18438398717140).

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

16016405663780 is a wasteful number, since it uses less digits than its factorization.

16016405663780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19532202079 (or 19532202077 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 16016405663780 in words is "sixteen trillion, sixteen billion, four hundred five million, six hundred sixty-three thousand, seven hundred eighty".