16535383680 has 128 divisors (see below), whose sum is σ = 52807276800. Its totient is φ = 4401008640.

The previous prime is 16535383679. The next prime is 16535383723. The reversal of 16535383680 is 8638353561.

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 (48).

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, 1030761 + ... + 1046679.

It is an arithmetic number, because the mean of its divisors is an integer number (412556850).

Almost surely, 2^16535383680 is an apocalyptic number.

16535383680 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 16535383680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26403638400).

16535383680 is an abundant number, since it is smaller than the sum of its proper divisors (36271893120).

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

16535383680 is a wasteful number, since it uses less digits than its factorization.

16535383680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16482 (or 16470 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 16535383680 in words is "sixteen billion, five hundred thirty-five million, three hundred eighty-three thousand, six hundred eighty".