19550868679616 has 112 divisors (see below), whose sum is σ = 40280911360800. Its totient is φ = 9403843018752.

The previous prime is 19550868679607. The next prime is 19550868679637. The reversal of 19550868679616 is 61697686805591.

It is a super-2 number, since 2×19550868679616² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (77) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1506339815 + ... + 1506352793.

Almost surely, 2^{19550868679616} is an apocalyptic number.

19550868679616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19550868679616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20140455680400).

19550868679616 is an abundant number, since it is smaller than the sum of its proper divisors (20730042681184).

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

19550868679616 is a wasteful number, since it uses less digits than its factorization.

19550868679616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15926 (or 15916 counting only the distinct ones).

The product of its (nonzero) digits is 1175731200, while the sum is 77.

The spelling of 19550868679616 in words is "nineteen trillion, five hundred fifty billion, eight hundred sixty-eight million, six hundred seventy-nine thousand, six hundred sixteen".