16325561161 has 16 divisors (see below), whose sum is σ = 20966609664. Its totient is φ = 12355320384.

The previous prime is 16325561143. The next prime is 16325561177. The reversal of 16325561161 is 16116552361.

It is a cyclic number.

It is not a de Polignac number, because 16325561161 - 2⁵ = 16325561129 is a prime.

It is a super-3 number, since 3×16325561161³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16325561161.

It is not an unprimeable number, because it can be changed into a prime (16325561141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3897946 + ... + 3902131.

It is an arithmetic number, because the mean of its divisors is an integer number (1310413104).

Almost surely, 2^16325561161 is an apocalyptic number.

It is an amenable number.

16325561161 is a deficient number, since it is larger than the sum of its proper divisors (4641048503).

16325561161 is a wasteful number, since it uses less digits than its factorization.

16325561161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7800120.

The product of its digits is 32400, while the sum is 37.

The spelling of 16325561161 in words is "sixteen billion, three hundred twenty-five million, five hundred sixty-one thousand, one hundred sixty-one".