16536631524 has 72 divisors (see below), whose sum is σ = 45113302080. Its totient is φ = 4700735424.

The previous prime is 16536631523. The next prime is 16536631547. The reversal of 16536631524 is 42513663561.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (16536631523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44457 + ... + 187215.

It is an arithmetic number, because the mean of its divisors is an integer number (626573640).

Almost surely, 2^16536631524 is an apocalyptic number.

16536631524 is a gapful number since it is divisible by the number (14) 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 16536631524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22556651040).

16536631524 is an abundant number, since it is smaller than the sum of its proper divisors (28576670556).

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

16536631524 is a wasteful number, since it uses less digits than its factorization.

16536631524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142977 (or 142968 counting only the distinct ones).

The product of its digits is 388800, while the sum is 42.

The spelling of 16536631524 in words is "sixteen billion, five hundred thirty-six million, six hundred thirty-one thousand, five hundred twenty-four".