16539697152 has 450 divisors, whose sum is σ = 54841210424. Its totient is φ = 4963368960.

The previous prime is 16539697123. The next prime is 16539697157. The reversal of 16539697152 is 25179693561.

16539697152 is a `hidden beast` number, since 1 + 6 + 539 + 6 + 97 + 15 + 2 = 666.

It is a super-2 number, since 2×16539697152² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16539697157) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 160579533 + ... + 160579635.

Almost surely, 2^16539697152 is an apocalyptic number.

16539697152 is a gapful number since it is divisible by the number (12) 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 16539697152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27420605212).

16539697152 is an abundant number, since it is smaller than the sum of its proper divisors (38301513272).

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

16539697152 is an equidigital number, since it uses as much as digits as its factorization.

16539697152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 119 counting only the distinct ones).

The product of its digits is 3061800, while the sum is 54.

The spelling of 16539697152 in words is "sixteen billion, five hundred thirty-nine million, six hundred ninety-seven thousand, one hundred fifty-two".