19655044985016 has 384 divisors, whose sum is σ = 62225383334400. Its totient is φ = 5489466577920.

The previous prime is 19655044984969. The next prime is 19655044985021. The reversal of 19655044985016 is 61058944055691.

19655044985016 is a `hidden beast` number, since 1 + 9 + 6 + 5 + 504 + 49 + 85 + 0 + 1 + 6 = 666.

It is a super-2 number, since 2×19655044985016² (a number of 27 digits) contains 22 as substring.

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 95 ways as a sum of consecutive naturals, for example, 1245006675 + ... + 1245022461.

It is an arithmetic number, because the mean of its divisors is an integer number (162045269100).

Almost surely, 2^{19655044985016} 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 19655044985016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31112691667200).

19655044985016 is an abundant number, since it is smaller than the sum of its proper divisors (42570338349384).

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

19655044985016 is a wasteful number, since it uses less digits than its factorization.

19655044985016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16219 (or 16212 counting only the distinct ones).

The product of its (nonzero) digits is 46656000, while the sum is 63.

The spelling of 19655044985016 in words is "nineteen trillion, six hundred fifty-five billion, forty-four million, nine hundred eighty-five thousand, sixteen".