161560011 has 8 divisors (see below), whose sum is σ = 215886544. Its totient is φ = 107470080.

The previous prime is 161559991. The next prime is 161560031. The reversal of 161560011 is 110065161.

161560011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161559991) and next prime (161560031).

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

It is not a de Polignac number, because 161560011 - 2¹⁹ = 161035723 is a prime.

It is a super-2 number, since 2×161560011² = 52203274308640242, which 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 161560011.

It is not an unprimeable number, because it can be changed into a prime (161560031) 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, 57550 + ... + 60291.

It is an arithmetic number, because the mean of its divisors is an integer number (26985818).

Almost surely, 2^161560011 is an apocalyptic number.

161560011 is a deficient number, since it is larger than the sum of its proper divisors (54326533).

161560011 is a wasteful number, since it uses less digits than its factorization.

161560011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118301.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 161560011 is about 12710.6259090574. The cubic root of 161560011 is about 544.6422037832.

The spelling of 161560011 in words is "one hundred sixty-one million, five hundred sixty thousand, eleven".