19553390616 has 128 divisors (see below), whose sum is σ = 53518786560. Its totient is φ = 5926502400.

The previous prime is 19553390587. The next prime is 19553390651. The reversal of 19553390616 is 61609335591.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11521480 + ... + 11523176.

It is an arithmetic number, because the mean of its divisors is an integer number (418115520).

Almost surely, 2^19553390616 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 19553390616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26759393280).

19553390616 is an abundant number, since it is smaller than the sum of its proper divisors (33965395944).

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

19553390616 is a wasteful number, since it uses less digits than its factorization.

19553390616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665 (or 2661 counting only the distinct ones).

The product of its (nonzero) digits is 656100, while the sum is 48.

The spelling of 19553390616 in words is "nineteen billion, five hundred fifty-three million, three hundred ninety thousand, six hundred sixteen".