16321199500541 has 8 divisors (see below), whose sum is σ = 17581981797240. Its totient is φ = 15061175119872.

The previous prime is 16321199500537. The next prime is 16321199500579. The reversal of 16321199500541 is 14500599112361.

It can be written as a sum of positive squares in 4 ways, for example, as 3553055352025 + 12768144148516 = 1884955^2 + 3573254^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16321199500541 - 2² = 16321199500537 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16321199503541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189434276 + ... + 189520413.

It is an arithmetic number, because the mean of its divisors is an integer number (2197747724655).

Almost surely, 2^{16321199500541} is an apocalyptic number.

It is an amenable number.

16321199500541 is a deficient number, since it is larger than the sum of its proper divisors (1260782296699).

16321199500541 is a wasteful number, since it uses less digits than its factorization.

16321199500541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378958015.

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 16321199500541 in words is "sixteen trillion, three hundred twenty-one billion, one hundred ninety-nine million, five hundred thousand, five hundred forty-one".