16561625159 has 8 divisors (see below), whose sum is σ = 16581150432. Its totient is φ = 16542115200.

The previous prime is 16561625123. The next prime is 16561625161. The reversal of 16561625159 is 95152616561.

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 16561625159 - 2⁸ = 16561624903 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 (16561625459) 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, 6103187 + ... + 6105899.

It is an arithmetic number, because the mean of its divisors is an integer number (2072643804).

Almost surely, 2^16561625159 is an apocalyptic number.

16561625159 is a deficient number, since it is larger than the sum of its proper divisors (19525273).

16561625159 is a wasteful number, since it uses less digits than its factorization.

16561625159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7657.

The product of its digits is 486000, while the sum is 47.

The spelling of 16561625159 in words is "sixteen billion, five hundred sixty-one million, six hundred twenty-five thousand, one hundred fifty-nine".