22761455161 has 3 divisors (see below), whose sum is σ = 22761606031. Its totient is φ = 22761304292.

The previous prime is 22761455147. The next prime is 22761455177. The reversal of 22761455161 is 16155416722.

The square root of 22761455161 is 150869.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16155416722 = 2 ⋅8077708361.

It can be written as a sum of positive squares in only one way, i.e., 2031214761 + 20730240400 = 45069^2 + 143980^2 .

It is not a de Polignac number, because 22761455161 - 2¹³ = 22761446969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22761455141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 75435 + ... + 226303.

Almost surely, 2^22761455161 is an apocalyptic number.

22761455161 is the 150869-th square number.

22761455161 is the 75435-th centered octagonal number.

It is an amenable number.

22761455161 is a deficient number, since it is larger than the sum of its proper divisors (150870).

22761455161 is an frugal number, since it uses more digits than its factorization.

22761455161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301738 (or 150869 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The spelling of 22761455161 in words is "twenty-two billion, seven hundred sixty-one million, four hundred fifty-five thousand, one hundred sixty-one".