16257246720 has 640 divisors, whose sum is σ = 62069027328. Its totient is φ = 3578265600.

The previous prime is 16257246713. The next prime is 16257246721. The reversal of 16257246720 is 2764275261.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16257246721) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 124101055 + ... + 124101185.

Almost surely, 2^16257246720 is an apocalyptic number.

16257246720 is a gapful number since it is divisible by the number (10) 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 16257246720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31034513664).

16257246720 is an abundant number, since it is smaller than the sum of its proper divisors (45811780608).

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

16257246720 is a wasteful number, since it uses less digits than its factorization.

16257246720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 16257246720 in words is "sixteen billion, two hundred fifty-seven million, two hundred forty-six thousand, seven hundred twenty".