16561438202 has 8 divisors (see below), whose sum is σ = 25643517312. Its totient is φ = 8013599100.

The previous prime is 16561438181. The next prime is 16561438211. The reversal of 16561438202 is 20283416561.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 133559924 + ... + 133560047.

It is an arithmetic number, because the mean of its divisors is an integer number (3205439664).

Almost surely, 2^16561438202 is an apocalyptic number.

16561438202 is a deficient number, since it is larger than the sum of its proper divisors (9082079110).

16561438202 is a wasteful number, since it uses less digits than its factorization.

16561438202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267120004.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 16561438202 in words is "sixteen billion, five hundred sixty-one million, four hundred thirty-eight thousand, two hundred two".