16133821537 has 4 divisors (see below), whose sum is σ = 16166681136. Its totient is φ = 16100961940.

The previous prime is 16133821447. The next prime is 16133821541. The reversal of 16133821537 is 73512833161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73512833161 = 379 ⋅193965259.

It is a cyclic number.

It is not a de Polignac number, because 16133821537 - 2³¹ = 13986337889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16133821537.

It is not an unprimeable number, because it can be changed into a prime (16133821237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16429063 + ... + 16430044.

It is an arithmetic number, because the mean of its divisors is an integer number (4041670284).

Almost surely, 2^16133821537 is an apocalyptic number.

It is an amenable number.

16133821537 is a deficient number, since it is larger than the sum of its proper divisors (32859599).

16133821537 is an equidigital number, since it uses as much as digits as its factorization.

16133821537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32859598.

The product of its digits is 90720, while the sum is 40.

The spelling of 16133821537 in words is "sixteen billion, one hundred thirty-three million, eight hundred twenty-one thousand, five hundred thirty-seven".