10997507161 has 3 divisors (see below), whose sum is σ = 10997612031. Its totient is φ = 10997402292.

The previous prime is 10997507153. The next prime is 10997507189. The reversal of 10997507161 is 16170579901.

The square root of 10997507161 is 104869.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 3584297161 + 7413210000 = 59869^2 + 86100^2 .

It is not a de Polignac number, because 10997507161 - 2³ = 10997507153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10997507561) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 52435 + ... + 157303.

It is an arithmetic number, because the mean of its divisors is an integer number (3665870677).

Almost surely, 2^10997507161 is an apocalyptic number.

10997507161 is the 104869-th square number.

10997507161 is the 52435-th centered octagonal number.

It is an amenable number.

10997507161 is a deficient number, since it is larger than the sum of its proper divisors (104870).

10997507161 is an frugal number, since it uses more digits than its factorization.

10997507161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209738 (or 104869 counting only the distinct ones).

The product of its (nonzero) digits is 119070, while the sum is 46.

The spelling of 10997507161 in words is "ten billion, nine hundred ninety-seven million, five hundred seven thousand, one hundred sixty-one".