16180857616 has 225 divisors, whose sum is σ = 40893319943. Its totient is φ = 6197378880.

The previous prime is 16180857599. The next prime is 16180857647. The reversal of 16180857616 is 61675808161.

It is a happy number.

The square root of 16180857616 is 127204.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 16180857616.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 274251795 + ... + 274251853.

Almost surely, 2^16180857616 is an apocalyptic number.

16180857616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

16180857616 is the 127204-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16180857616

16180857616 is an abundant number, since it is smaller than the sum of its proper divisors (24712462327).

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

16180857616 is an frugal number, since it uses more digits than its factorization.

16180857616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 49.

Multiplying 16180857616 by its sum of digits (49), we get a square (792862023184 = 890428²).

16180857616 divided by its sum of digits (49) gives a square (330221584 = 18172²).

The spelling of 16180857616 in words is "sixteen billion, one hundred eighty million, eight hundred fifty-seven thousand, six hundred sixteen".