16524738540 has 72 divisors (see below), whose sum is σ = 50233555008. Its totient is φ = 4397057280.

The previous prime is 16524738499. The next prime is 16524738569. The reversal of 16524738540 is 4583742561.

16524738540 is a `hidden beast` number, since 1 + 6 + 524 + 7 + 3 + 85 + 40 = 666.

It is a super-2 number, since 2×16524738540² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15801 + ... + 182480.

It is an arithmetic number, because the mean of its divisors is an integer number (697688264).

Almost surely, 2^16524738540 is an apocalyptic number.

16524738540 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 16524738540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25116777504).

16524738540 is an abundant number, since it is smaller than the sum of its proper divisors (33708816468).

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

16524738540 is a wasteful number, since it uses less digits than its factorization.

16524738540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198759 (or 198754 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 16524738540 in words is "sixteen billion, five hundred twenty-four million, seven hundred thirty-eight thousand, five hundred forty".