16291509696 has 336 divisors, whose sum is σ = 60169795840. Its totient is φ = 4231180800.

The previous prime is 16291509629. The next prime is 16291509709. The reversal of 16291509696 is 69690519261.

16291509696 is a `hidden beast` number, since 1 + 629 + 1 + 5 + 0 + 9 + 6 + 9 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1458051 + ... + 1469181.

Almost surely, 2^16291509696 is an apocalyptic number.

16291509696 is a gapful number since it is divisible by the number (16) 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 16291509696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30084897920).

16291509696 is an abundant number, since it is smaller than the sum of its proper divisors (43878286144).

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

16291509696 is a wasteful number, since it uses less digits than its factorization.

16291509696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11181 (or 11154 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 54.

The spelling of 16291509696 in words is "sixteen billion, two hundred ninety-one million, five hundred nine thousand, six hundred ninety-six".