16550581372031 has 32 divisors (see below), whose sum is σ = 19745260472448. Its totient is φ = 13576746792960.

The previous prime is 16550581371983. The next prime is 16550581372063. The reversal of 16550581372031 is 13027318505561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16550581372031 is a prime.

It is a super-2 number, since 2×16550581372031² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16550581372081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91738691 + ... + 91918923.

It is an arithmetic number, because the mean of its divisors is an integer number (617039389764).

Almost surely, 2^{16550581372031} is an apocalyptic number.

16550581372031 is a deficient number, since it is larger than the sum of its proper divisors (3194679100417).

16550581372031 is a wasteful number, since it uses less digits than its factorization.

16550581372031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186371.

The product of its (nonzero) digits is 756000, while the sum is 47.

Adding to 16550581372031 its reverse (13027318505561), we get a palindrome (29577899877592).

The spelling of 16550581372031 in words is "sixteen trillion, five hundred fifty billion, five hundred eighty-one million, three hundred seventy-two thousand, thirty-one".