16535069568 has 128 divisors (see below), whose sum is σ = 49276281600. Its totient is φ = 5458060800.

The previous prime is 16535069549. The next prime is 16535069591. The reversal of 16535069568 is 86596053561.

It is a happy number.

16535069568 is a `hidden beast` number, since 16 + 5 + 3 + 5 + 0 + 69 + 568 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

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 15 ways as a sum of consecutive naturals, for example, 332743 + ... + 379193.

It is an arithmetic number, because the mean of its divisors is an integer number (384970950).

Almost surely, 2^16535069568 is an apocalyptic number.

16535069568 is a gapful number since it is divisible by the number (18) 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 16535069568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24638140800).

16535069568 is an abundant number, since it is smaller than the sum of its proper divisors (32741212032).

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

16535069568 is a wasteful number, since it uses less digits than its factorization.

16535069568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46577 (or 46559 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 16535069568 in words is "sixteen billion, five hundred thirty-five million, sixty-nine thousand, five hundred sixty-eight".