16557090396 has 144 divisors (see below), whose sum is σ = 49952246400. Its totient is φ = 4219313280.

The previous prime is 16557090353. The next prime is 16557090397. The reversal of 16557090396 is 69309075561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16557090397) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 318655 + ... + 366953.

It is an arithmetic number, because the mean of its divisors is an integer number (346890600).

Almost surely, 2^16557090396 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 16557090396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24976123200).

16557090396 is an abundant number, since it is smaller than the sum of its proper divisors (33395156004).

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

16557090396 is a wasteful number, since it uses less digits than its factorization.

16557090396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48384 (or 48375 counting only the distinct ones).

The product of its (nonzero) digits is 1530900, while the sum is 51.

The spelling of 16557090396 in words is "sixteen billion, five hundred fifty-seven million, ninety thousand, three hundred ninety-six".