16506992831 has 8 divisors (see below), whose sum is σ = 18886410240. Its totient is φ = 14132894328.

The previous prime is 16506992813. The next prime is 16506992851. The reversal of 16506992831 is 13829960561.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-16506992831 is a prime.

It is a super-2 number, since 2×16506992831² (a number of 21 digits) contains 22 as substring.

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 16506992831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16506992851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1323071 + ... + 1335488.

It is an arithmetic number, because the mean of its divisors is an integer number (2360801280).

Almost surely, 2^16506992831 is an apocalyptic number.

16506992831 is a deficient number, since it is larger than the sum of its proper divisors (2379417409).

16506992831 is an equidigital number, since it uses as much as digits as its factorization.

16506992831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659453.

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 16506992831 in words is "sixteen billion, five hundred six million, nine hundred ninety-two thousand, eight hundred thirty-one".